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H C Williams

Publications and source records attributed to H C Williams.

At least 19 recordsLinked to original sources
PubMed2004

Genetic association between an AACC insertion in the 3'UTR of the stratum corneum chymotryptic enzyme gene and atopic dermatitis.

Atopic dermatitis is a disease with an impaired skin barrier that affects 15%-20% of children. In the normal epidermis, the stratum corneum chymotryptic enzyme (SCCE) thought to play a central role in desquamation by cleaving proteins of the stratum corneum (e.g., corneodesmosin and plakoglobin). Genetic variations within the SCCE gene could be associated with dysregulation of SCCE activity leading to an abnormal skin barrier. We screened the SCCE gene for variations and performed a case-control study on 103 atopic dermatitis patients and 261 matched controls. 16 synonymous single nucleotide polymorphisms (SNPs) have been identified and a 4 bp (AACC) insertion has been found in the 3'UTR. We performed an association study of the SCCE AACC insertion in the 3'UTR, and found a significant trend between the AACC allele with the two insertions and disease in the overall data set [odds ratio (OR)=2.31; p=0.0007]. The AACC insertion in the SCCE gene may result in a change to SCCE activity within the skin barrier. These findings suggest that SCCE could have an important role in the development of atopic dermatitis.

3' Untranslated Regions↗
PubMed2004

Factors influencing atopic dermatitis-a questionnaire survey of schoolchildren's perceptions.

BACKGROUND: Although there is growing knowledge about factors that may predispose to the onset of atopic dermatitis (AD), little is known about factors which may exacerbate existing disease. AD sufferers and those involved in the management of the disease are often aware of factors that influence its course and severity. However, there is little available evidence on the distribution and relative importance of such factors, and what information exists is derived from selected groups such as hospital patients and may not therefore be representative of the AD population as a whole. OBJECTIVES: To determine the distribution and relative importance of 19 potential exacerbating and relieving factors as perceived by a population-based sample of schoolchildren with AD. METHODS: A questionnaire was used to identify all children with AD in years 8 and 9 (12-14-year-olds) from eight comprehensive schools across Wales. These individuals were then requested to complete a supplementary questionnaire which asked them to state for each of 19 factors whether (i) it makes their eczema better, (ii) it makes their eczema worse, (iii) it has no effect, or (iv) they do not know its effects. RESULTS: Almost 10% (250 of 2501) of children surveyed were considered to have AD, and 90% (225 of 250) of these completed the supplementary questionnaire. Most AD sufferers found that none to two factors relieve their symptoms whilst none to five factors exacerbate them. Sweating from exercise, fabrics (especially wool) and hot weather were the three most common exacerbators, affecting 41.8%, 40% and 39.1%, respectively, of AD responders. The three key relievers were steroid creams (22.2% of AD responders), moisturizers/makeup (16.4%) and medicines/tablets (13.8%). Almost 60% of respondents believed foods have no effect on their symptoms. There was also evidence to suggest that 12.4% (28 of 225) of participants may use creams which they are not aware contain steroids. CONCLUSIONS: These findings shed light on the relative perceived importance of factors such as food, aeroallergens, sweat, climate, illness, stress and therapies for the course of AD in a representative population sample of AD sufferers. Such information might be explored during clinical consultations given the increasing participation of sufferers and their carers in the management of this chronic disease. These findings also form the basis of hypothesis generation for future analytical studies.

Adolescent↗
PubMed2004

Overview of studies of treatments for hand eczema-the EDEN hand eczema survey.

BACKGROUND: Hand eczema is a major cause of morbidity and lost earnings. Many interventions ranging from topical steroids to oral ciclosporin are used, but their evidence base and the best methods to assess their efficacy are uncertain. OBJECTIVES: As part of a long-term project to improve standards of design and reporting in hand eczema trials, we sought to describe the prevalent study designs and comment on the quality of reporting of such studies. METHODS AND DATA SOURCES: Electronic databases (Cochrane, Medline, Embase, Pascal, Jicst-Eplus, Amed) were searched from January 1977 to April 2003 using all possible variants of the terms hand and eczema/dermatitis. In addition, four general medical and 17 specialist dermatology journals were hand-searched by pairs of researchers for all possible therapeutic studies. STUDY SELECTION: Studies were eligible for inclusion if they dealt with hand eczema as diagnosed by a physician irrespective of the aetiology, and if they described the results of a study of a therapeutic intervention in humans. Single case reports and reviews were excluded, but case series and nonrandomized studies were considered alongside randomized studies. Data selection For each study, two researchers independently assessed the type of study, outcome measures, enrolment criteria, randomization, masking of interventions and how losses to follow-up were dealt with. MAIN OUTCOME MEASURES: Proportion of studies according to type of intervention and study type. Proportion of randomized controlled trials (RCTs) that adequately reported eligibility criteria, randomization generation and concealment, masking and intention-to-treat analysis. RESULTS: A total of 90 studies reported in 87 papers dealt with 11 different classes of interventions. Around 80% of the studies dealt with just four interventions: ultraviolet light, topical steroids, radiation and systemic immunosuppressives. Of the 90 studies, 44 were case series, 15 were nonrandomized controlled trials, and the remaining 31 were RCTs. Of the 31 RCTs, 16 were parallel (one with cross-over design) and 15 self-controlled. Only 11 of the RCTs adequately reported eligibility criteria. The randomization method was described in 10, and there was adequate concealment of allocation in eight. Masking the treatment allocation from both the study assessors and patients was done in 11 RCTs, and intention-to-treat analysis was reported in four. Only 13 RCTs were 4 months or longer in duration. No study reported a rationale for the sample size, and in only one study had the outcome variable been validated. CONCLUSIONS: Most 'trials' in hand eczema are not RCTs. Internally controlled (left/right) studies were common. Based on the poor overall quality of reporting, most RCTs of hand eczema trials are not adequate to guide clinical practice. Future trials of hand eczema should be randomized, using a parallel group or self-controlled design. Research is needed to develop validated and clinically relevant outcome measures. Most of the remaining issues relating to poor quality of existing evidence can be relatively easily dealt with by following the CONSORT guidelines.

Eczema↗
PubMed2004

Prevalence and associated factors of atopic dermatitis symptoms in rural and urban Ethiopia.

BACKGROUND: Allergic diseases, including atopic dermatitis (AD), are increasingly becoming a clinical problem in developing countries. OBJECTIVE: We investigated the prevalence of AD symptoms and the effects of potential environmental aetiologies in rural and urban areas of Jimma in southwestern Ethiopia. METHODS: Information on allergic disease symptoms and lifestyle factors was gathered in an interviewer-led cross-sectional questionnaire-based population survey of 9844 urban and 3032 rural participants of all ages. A one-in-four subsample underwent skin prick testing for hypersensitivity to Dermatophagoides pteronyssinus, mixed threshings, and aspergillus. RESULTS: Around 95% of those eligible took part in the survey. Lifetime cumulative prevalence of AD symptoms was generally low with an overall prevalence of 1.2%, but was higher in the urban (1.5%) than in the rural area (0.3%; odds ratio (OR)=4.45 [95% CI 2.34-8.47]). AD symptoms were strongly associated with wheeze (adjusted OR=22.03 [15.45-31.42]) and rhinitis symptoms (61.94 [42.66-89.95]). Of several environmental exposures assessed, residence in a house made of brick (rather than mud) walls with wooden (rather than clay) floor, exposure to cigarette smoke as a child, having lived outside of Jimma in the past, and being of the Tigrean ethnic group were associated with an increased risk of AD symptoms. CONCLUSION: Although the overall prevalence of AD symptoms was low in this Ethiopian population, a marked urban-rural gradient was evident. Lifestyle factors linked to urbanization were associated with an increased risk of AD symptoms.

Adolescent↗
PubMed2004

Do dermatology outpatients value a copy of the letter sent to their general practitioner? In what way and at what cost?

Dermatology services are largely outpatient based. Time for satisfactory patient communication is limited, with an average of around 15 min per new patient. The amount of new information that can be retained after verbal communication alone is limited during such consultations. One way to reinforce such information is to send patients a copy of the hospital specialist's letter to the general practitioner. Before advocating this unreservedly, it is important to explore the value patients attach to receiving such a letter and to estimate the cost of this practice. In order to explore patients' views of copy letters more fully, all patients attending dermatology outpatients at Queen's Medical Centre, Nottingham during a week in October 2001 were sent copy letters and later interviewed by telephone using a structured questionnaire that gathered information on content, usage, clarity and perceived usefulness. Direct costs were also calculated. Of 70 patients invited to participate, 59 (85%) could be contacted by telephone at the 2-week follow-up period. Of those 59 patients contacted by telephone, surprisingly only 46 (78%) had actually received a copy letter at 14 days post-consultation. Of the 46 patients receiving a copy letter, 45 (98%) thought the information in the letter was consistent with their consultation; the letter was read a mean number of two times; nine patients (20%) understood most and 36 (78%) all of the letter; 25 (54%) found it useful and a further 21 (46%) found it very useful. Patients' views as to the value in receiving the letter included improved communication, recall and a sense of increased involvement in health care decisions. The direct total cost of sending a copy letter was 25.3 pence per patient. Consultants who participated in the exercise did not perceive any additional difficulties in implementing this practice. This small study found that 100% of patients receiving a copy letter found it useful. The fact that around one-fifth of patients did not receive such copy letters within 2 weeks as intended is worrying, and requires further investigation. Sending a copy letter involves a relatively trivial cost for a practice which patients view as a valuable resource.

Ambulatory Care↗
PubMed2003

Interventions for basal cell carcinoma of the skin.

BACKGROUND: Basal cell carcinoma (BCC) is the most common skin malignancy in humans. BCCs are defined as slow-growing, locally invasive, malignant (but not life threatening), epidermal skin tumours which mainly affect white skinned people. The first line treatment is usually surgical excision, but numerous alternatives are available. OBJECTIVES: To assess the effects of treatments for basal cell carcinoma. SEARCH STRATEGY: We searched the Cochrane Database of Systematic Reviews (2002 issue 1) and Cochrane Controlled Trials Register (2002 issue 1), the Cochrane Skin Group Specialised Register (January 2002), MEDLINE (from 1966-2002), EMBASE (from 1980-2002), the Mega Register of Controlled trials and the National Research Register (2002 issue 1). In addition the cited references of all trials identified and key review articles were searched. Pharmaceutical companies were contacted where appropriate for reviews or unpublished trials. SELECTION CRITERIA: Inclusion criteria were adults with one or more histologically proven, primary basal cell carcinoma. The primary outcome measure was recurrence at 3- 5 years, measured clinically. The secondary outcome included early treatment failure within 6 months, measured histologically. Adverse effect of treatment was evaluated by reviewing aesthetic appearance (to patient and blinded observer) and pain during and after treatment. DATA COLLECTION AND ANALYSIS: Study selection and assessment of methodological quality were carried out by two independent reviewers. MAIN RESULTS: 19 studies (13 published and 6 abstracts) were identified which include 7 broad therapeutic categories. Only one RCT of surgery versus radiotherapy had primary outcome data at four years, which showed that there were significantly more persistent tumours and recurrences, measured histologically, in the radiotherapy group as compared to the surgery group, which translates to an odds ratio of 0.09 (95%CI, 0.01 to 0.67) in favour of surgery. Cryotherapy, although convenient and less expensive than surgery, showed no significant difference in recurrences at one year, measured clinically, when compared to surgery, OR 0.23 (0.01 to 6.78). However when radiotherapy was compared to cryotherapy there were significantly more recurrences at one year, measured histologically, in the cryotherapy group, this translates to an odds ratio of 14.80 (95%CI, 3.17 to 69) in favour of radiotherapy. Preliminary studies suggest a high success rate (87-88%) for imiquimod in the treatment of superficial BCC using a once-daily regimen for 6 weeks and a useful (76%) treatment response when treating nodular BCC for 12 weeks, when measured histologically. However this cream has not been compared to surgery. REVIEWER'S CONCLUSIONS: There has been very little good quality research on efficacy of the treatment modalities used. Most of the trials have looked only at BCCs in low risk areas. Surgery and radiotherapy appear to be the most effective treatments with surgery showing the lowest failure rates. Other treatments might have some use but few have been compared to surgery. Imiquimod emerged as a possible new treatment although it has not been compared to surgery or any other modality.

Adult↗
PubMed2002

Randomised controlled trial of short bursts of a potent topical corticosteroid versus prolonged use of a mild preparation for children with mild or moderate atopic eczema.

OBJECTIVE: To determine whether a three day burst of a potent corticosteroid is more effective than a mild preparation used for seven days in children with mild or moderate atopic eczema. DESIGN: Randomised, double blind, parallel group study of 18 weeks' duration. SETTING: 13 general practices and a teaching hospital in the Nottingham area. PARTICIPANTS: 174 children with mild or moderate atopic eczema recruited from general practices and 33 from a hospital outpatient clinic. INTERVENTIONS: 0.1% betamethasone valerate applied for three days followed by the base ointment for four days versus 1% hydrocortisone applied for seven days. MAIN OUTCOME MEASURES: Primary outcomes were total number of scratch-free days and number of relapses. Secondary outcomes were median duration of relapses, number of undisturbed nights, disease severity (six area, six sign atopic dermatitis severity scale), scores on two quality of life measures (children's life quality index and dermatitis family impact questionnaire), and number of patients in whom treatment failed in each arm. RESULTS: No differences were found between the two groups. This was consistent for all outcomes. The median number of scratch-free days was 118.0 for the mild group and 117.5 for the potent group (difference 0.5, 95% confidence interval -2.0 to 4.0, P=0.53). The median number of relapses for both groups was 1.0. Both groups showed clinically important improvements in disease severity and quality of life compared with baseline. CONCLUSION: A short burst of a potent topical corticosteroid is just as effective as prolonged use of a milder preparation for controlling mild or moderate atopic eczema in children.

Administration, Topical↗
PubMed2002

Clinical examinations to validate self-completion questionnaires: dermatitis in the UK printing industry.

A self-completion questionnaire sent to 2600 Nottinghamshire members of the Graphical Paper and Media Union elicited a 62% response. Forty one per cent of respondents reported suffering a skin complaint at some time and 11% had a current skin problem on the hand. This paper reports the validation stage of the study. Samples of 45 'cases' of self-reported dermatitis and 60 'controls', who reported they had never suffered a skin complaint, were clinically examined. All 45 self-reported cases were clinically confirmed as dermatitis. Occupationally related irritant contact dermatitis (ICD) was diagnosed in 20 (44%); 26 (58%) complaints were thought to be induced or exacerbated by occupation. Of the controls, 21 (35%) were also diagnosed with a skin complaint, the majority being mild, with an occupational association in 17, the majority (15) being ICD. Sixteen ICD cases were patch tested resulting in positive reactions to colophony, neomycin, nickel and potassium dichromate (2 of each). Two cases of basal cell carcinoma on the face were also identified, of which the participants were unaware. Although there was no false positive self-reporting there was a considerable number of false negatives, demonstrating the importance of clinical validation of questionnaires relating to industrial skin disease. This study has highlighted the need for improvement in skin care provision in the printing industry.

Adult↗
PubMed2002

Reliability testing of the Six Area, Six Sign Atopic Dermatitis severity score.

BACKGROUND: The Six Area, Six Sign Atopic Dermatitis (SASSAD) severity score is an objective atopic eczema severity index designed principally to assess response to treatment in therapeutic trials. Validity has been demonstrated in single and multicentre clinical trials, although data on the reliability of the index have not previously been published. OBJECTIVES: To assess inter- and intraobserver variability of the SASSAD index. METHODS: Six observers with experience in the assessment of atopic eczema were each asked to score disease severity in six patients with moderate to severe atopic eczema using the SASSAD index. Repeat observations were carried out on randomly selected patients by each observer to estimate intraobserver variation. RESULTS: The interobserver variation in total SASSAD scores for each patient ranged from 7 to 30 (median 15.5) out of a maximum possible score of 108. The intraclass correlation coefficient ri for the total scores among all six observers was quite high at 0.70, although interobserver agreement for individual components of the index was poor to moderate. The maximum recorded intraobserver variation in total SASSAD score in any of the examined patients was 8 units. CONCLUSIONS: As with many other tested atopic eczema scoring indices, the SASSAD index is subject to significant interobserver variation, reflecting the difficulties in reliably assessing eczema severity objectively.

Adolescent↗
PubMed2002

A randomized controlled trial of nurse follow-up clinics: do they help patients and do they free up consultants' time?

BACKGROUND: Nurse follow-up clinics have become increasingly popular in recent years. Their impact on service delivery within dermatology may be useful in relation to chronic diseases, where education and treatment concordance are important factors in disease management. OBJECTIVE: To assess the impact of providing a nurse follow-up clinic in addition to the normal service provided by the dermatology outpatient department at Queen's Medical Centre, Nottingham, and to obtain pilot data with which to inform future study design. METHODS: Newly referred patients aged >/= 14 years and with a diagnosis of either eczema or psoriasis were identified. In a randomized, parallel-group study with a follow-up period of 6 weeks, participants were randomized either to normal care, or to receive an additional session with a dermatology nurse specialist immediately after their consultation with the dermatologist. The primary outcome measure was change in quality of life at 6 weeks, as assessed by the Dermatology Life Quality Index (DLQI). Secondary outcomes comprised a comparison of patient knowledge at 6 weeks and the number of consultations (in secondary and primary care) that occurred during the 6-week follow-up period. RESULTS: Both groups improved by approximately 3 points on the DLQI scale after 6 weeks. The between-group difference was 0.27 (95% confidence interval - 2.3 to 2.8, P = 0.83). Patients who had seen the nurse were more likely to know how long they should apply treatment (P = 0.05). There was also a marked difference in patients' understanding of how to obtain a repeat prescription (P = 0.01) and from whom they could receive further support (P < 0.001). Following the addition of this service, 33% of follow-up appointments with a doctor were cancelled in the nurse intervention group. CONCLUSIONS: Dermatology nurses can add to a dermatology consultation and provide effective patient education and support in managing a skin condition. With this added service nurses could help to free up dermatologists' time, thus allowing them to see more new patients. Cost-effectiveness studies are now needed.

Adult↗
PubMed2002

Size matters.

Explore the source record for details and available documents.

Dermatology↗
PubMed2002

The prevalence of occupational dermatitis in the UK printing industry.

AIMS: To quantify occupational ill health resulting from dermatitis in the UK printing industry and to explore links with particular processes and activities. METHODS: Approximately 2600 members of the Graphical, Paper and Media Union living in Nottinghamshire were sent a self completion questionnaire. A sample of respondents, both those who reported current skin problems and those who did not, were invited for a short dermatological examination. RESULTS: The overall response rate was 62%. A total of 1189 respondents were directly involved in the printing industry and categorised according to work in pre-press (25%), printing (46%), or finishing (42%) processes. A total of 490 respondents (41%) self reported having a skin complaint at some time. Prevalence was highest in males (43%) and those working in printing (49%), in particular those who cleaned rollers and cylinders or who came into contact with substances containing isocyanates on a daily basis. The most commonly affected areas reported were the fingers and webs between the fingers. Twenty six per cent of the 490 reported a current problem on the hand. Reported symptoms included itching (61%), rash (58%), and dry skin (56%). Although certain printing industry substances were thought by respondents to aggravate their condition, constant washing and friction was most often cited. Reported use of protective equipment and cleansing products was generally high, particularly by printers. Clinical examination confirmed the high self reported prevalence and also identified a substantial proportion of mild cases which were not reported. The overall prevalence of occupationally related skin complaints is estimated to be 40%. CONCLUSIONS: A much higher prevalence of dermatitis has been identified than from routine surveillance schemes. The use of good quality records from unions with high membership facilitated access to workers across a range of company sites and printing processes. Validation of self reported symptoms through clinical examination was shown to be essential. The importance of non-chemical causes of dermatitis was highlighted. The findings point towards the need for the development of effective and acceptable risk reduction strategies, in particular to reduce water contact and friction.

Adult↗
PubMed2002

Self-regulation in hospital waiting lists.

There is evidence that hospital waiting lists in the UK are resistant to shortening because reductions in length generate increases in referrals. We explored this concept by examining outpatient data for eight specialties in a large hospital centre over 17 months. Correlation coefficients were calculated by regressing waiting list density (numbers waiting more than 26 weeks) against referral rate. In three of the eight specialties, with the longest waiting lists, referral rates were significantly related, after one month's delay, to waiting list density (P < 0.01)--dermatology, R=0.68; ear-nose-throat R=0.78; trauma/orthopaedics (R=0.64). These were the three with the longest lists. These results help to explain why initiatives to shorten waiting lists are commonly ineffective in the long term.

Hospitals, Public↗
PubMed2001

What is the cost of atopic dermatitis in preschool children?

BACKGROUND: Atopic dermatitis (AD) is the most common inflammatory skin disorder and an important cause of morbidity in young children in the U.K. Such disability produces significant economic burden reflected in direct medical costs associated with health service utilization, direct family care costs such as transport costs, indirect costs associated with loss of productivity of carers, and intangible costs associated with the psychological effects of the disease. OBJECTIVES: In order to evaluate this economic burden we conducted a cross-sectional survey of children aged 1-5 years in the Nottingham area in 1995-96. METHODS: We sent a postal questionnaire to parents of all children aged 1-5 years with questions to identify those with AD; a second questionnaire was sent to parents of identified children regarding costs and utilization of medical services. Intangible costs were not evaluated. RESULTS: The 12-month period prevalence of AD according to a dermatologist's diagnosis in 1761 children was 16.5% (95% confidence interval 14.7-18.2%). Total mean disease costs were estimated to be pound79.59 per child over the 12-month period of the study. The most significant costs were due to costs to the state for National Health Service (NHS) consultations ( pound28.62 mean annual cost) and prescriptions ( pound22.03). Consultations with general practitioners accounted for the significant bulk of consultation costs, with only 6% of children being seen in secondary care (17 of 290). Most prescribing costs (76%) were due to emollients and bath preparations. Family care costs ( pound28.94 mean annual cost) accounted for 36% of total disease costs and were associated with changes to the home environment, purchase of over-the-counter medicines, transport costs, visits to homoeopaths and salary loss. CONCLUSIONS: The results signify that AD is an important cause of economic burden both to the NHS and to the families of affected children. Using population census data and the results in this study, we estimated that the annual U.K. cost of AD in children aged 1-5 years in 1995-96 was pound47 million.

Age Distribution↗
PubMed2001

Environmental associations with eczema in early life.

BACKGROUND: Although atopic eczema (AE) is a common disease, little is known about its causes. OBJECTIVES: To investigate the role of dietary and environmental factors associated with the development of AE by the age of 2 years. METHODS: A cohort of children was recruited before birth from a consecutive series of newly pregnant mothers presenting for antenatal care at three general practices in Ashford, Kent, U.K. Data up to the age of 2 years were available for 624 (97%) of the original cohort. AE was defined using components of the U.K. diagnostic criteria for AE, maternal report of doctor-diagnosed eczema and maternally reported eczema. Exposures of interest were family history of allergic disease, dietary and breastfeeding patterns, family size and exposure to indoor domestic allergens. RESULTS: The cumulative prevalence of AE using the U.K. diagnostic criteria was 14% (95% confidence interval, CI 11-17%). The prevalence of maternally reported doctor-diagnosed eczema was much higher (31%, 95% CI 27-35%) and almost half (45%) the mothers reported that their child had ever had eczema (95% CI 41-49%). The relationship between parental atopy, parental history of allergic disease and the child's eczema was consistently stronger for the mothers than the fathers. There was a marked increase in the prevalence of eczema with increasing maternal education and in less crowded homes, associations that remained significant after controlling for other factors. CONCLUSIONS: The associations with environmental factors are consistent with the hypothesis that more crowded houses, increased family size and birth order, which may possibly increase early exposure to infections, may offer protection from subsequent development of eczema.

Adult↗