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R Fielding

Publications and source records attributed to R Fielding.

At least 19 recordsLinked to original sources
PubMed2006

Quality of life and pain in Chinese lung cancer patients: Is optimism a moderator or mediator?

OBJECTIVE: To clarify if optimism exerts a primarily moderating or mediating influence on the pain-QoL association in Chinese lung cancer patients. METHODS: About 334 Chinese lung cancer patients were interviewed at baseline during the first outpatient visit (Baseline), at 4 months after Baseline (FU1), and at 8 months after Baseline (FU2). Respondents completed the Chinese version of the FACT-G version-3 scale (FACT-G (Ch)). Optimism and pain were assessed using two 11-point self-rated items. Linear mixed effects (LME) models tested the moderating and mediating effects of optimism on QoL. RESULTS: Optimism, pain, and QoL were most strongly correlated at FU1. LME models failed to show any moderating effect by optimism on the pain-QoL association (standardized beta = -0.049, 95% CI -0.097 to 0.001). After adjustment for age, cancer stage, and disease recurrence, a modest mediating effect was observed for optimism on the pain-QoL association over the duration of the study (standardized beta = 0.047; Sobel test z = -4.317, p < 0.001). CONCLUSIONS: Optimism qualifies as a mediator between pain and QoL suggesting that pessimistic lung cancer patients are likely to experience greater QoL decrements in response to pain in the early post-diagnostic period. Effective pain control may be enhanced by inclusion of interventions that facilitate optimistic perspectives in patients. This study lends further support to the view that lung cancer patients' psychological needs are important in both pain control and QoL.

Adult↗
PubMed2006

Narrowing sexual behavioural differences between Chinese and non-Chinese populations in Hong Kong: implications for sexually transmitted infection (STI) transmission.

Information on sexual networking between different ethnic groups, in particular between Chinese and non-Chinese, is scarce. This study compared patterns of sexual behaviour and determinants of unsafe sexual behaviours amongst the Chinese and non-Chinese residents of Hong Kong. Of the 2,060 respondents (2060/4157; 50% response rate), 73% identified themselves as being ethnic Chinese. Overall, having a non-regular partner was more common amongst the non-Chinese (36%) than the Chinese (17%) respondents. Chinese people who were at increased risk of having had sex with a non-regular partner included social hygiene clinic attendees and airport travellers, males and ever smokers. For non-Chinese this was inconsistent condom use and being aged 18-45. Predictors of inconsistent condom use for Chinese included being aged 18-45, never having been married, and having had sex with non-regular partners; for non-Chinese the predictors were being aged 18-45, having had sex with non-regular partners and being unafraid of AIDS. We conclude that there are similarities and differences in sexual risk-taking behaviours between Chinese and non-Chinese residents in Hong Kong. To maximize potential public health benefits, behavioural interventions should be designed to address the different risk profiles of Chinese and non-Chinese populations separately.

Adolescent↗
PubMed2005

The Chinese Medical Interview Satisfaction Scale-revised (C-MISS-R): development and validation.

BACKGROUND: The Medical Interview Satisfaction Scale (MISS) measures patient consultation satisfaction. We validated a translated short-form of the original MISS on Hong Kong Chinese women with breast cancer. METHODS: The four highest scoring MISS Cognitive and Affective sub-scales items were administered in Chinese (C-MISS) to 224 female out patients. Phrasing revisions (C-MISS-R) were tested on 82 women. Random split tested factor structure stability. Convergent, divergent and criterion validation against other instruments was performed on 405 women. RESULTS: Two-factors accounted for 61.7% of variance but factor loadings differed from the original. Phrasing revision increased Affective sub-scale item-item correlations exceeding 0.3-64%. Two factors matching those of the original MISS, accounting for 65.2% of variance, explained 36.6% (Cognitive) and 28.8% (Affective) of variance, respectively. Alpha was 0.84,0.74 and 0.83 for the Cognitive and Affective sub-scales and total respectively. Correlations of difficulties with treatment decision making (r = -0.298), Self-efficacy (r = 0.194), optimism (r = 0.33), psychological morbidity (r = -209), marital status, education and age indicated acceptable validity. Test-retest reliability was 0.410. DISCUSSION: The Chinese MISS-Revised (C-MISS-R) has suitable factor structure and psychometric properties for use in consultation studies among Chinese female populations. Further validation is needed for males.

Aged↗
PubMed2005

Factors related to non-participation in physical activity among the students in Hong Kong.

The patterns and determinants of physical inactivity among the Chinese youths are unknown. This study assessed the prevalence and predictors of physical inactivity among students in a Hong Kong university. A cross-sectional survey of year 1 and year 3 Chinese undergraduate students in 1997, using a structured, self-administered questionnaire was carried out. Questionnaires were returned by 64 % (1189/1849) of the students. Thirty-one percent of the respondents did not participate in physical activity. Being female, not a university resident, studying in the Faculty of Arts and rating current health status as poor or very poor were predictors of physical inactivity. No time and no interest were the most common reasons for non-participation in physical activity among the students. This study showed that about one-third of Chinese university students are physically inactive and would gain health benefits from organized intervention. Awareness among the students about the risks of physical inactivity should be enhanced and efforts made to increase physical activity should be reinforced. Factors identified as predictors of physical inactivity should be taken into account in the design of intervention.

Adult↗
PubMed2005

Secondhand smoke and respiratory ill health in current smokers.

BACKGROUND: Numerous studies have concluded that secondhand smoke (SHS) is harmful to non-smokers but controversy persists regarding its effects on smokers. The impact of SHS exposure on the acute respiratory health of current active smokers was examined using a cross sectional design. METHODS: 9923 uniformed staff in the Hong Kong Police Force completed a standardised questionnaire on current and past smoking, SHS exposure at home and at work, acute respiratory symptoms, and recent physician consultation. 3999 male current smokers were included in the analysis. RESULTS: About 5% of the smokers were exposed to SHS at home only, 53% were exposed at work only, and 30% were exposed both at home and at work. The prevalence ratios for respiratory symptoms (throat and nasal problems, cough, phlegm, and wheeze), physician consultation, and self medication were higher for those who were exposed to SHS at home or at work. The odds ratios of reporting one or more respiratory symptoms, for SHS exposures at home or at work, were 1.33 (95% confidence interval (CI) 1.12 to 1.59) and 1.66 (95% CI 1.36 to 2.02) respectively, after adjusting for age, marital status, education, rank and duties, exposure to self perceived dusty or polluted environment in previous job, and total dose of active smoking. The adjusted odds ratios showed significant positive dose-response gradients with SHS exposure at home, at work, and at both places combined. CONCLUSIONS: SHS exposure is strongly associated with increased acute respiratory symptoms and recent outpatient service utilisation in current smokers. If the association is causal, public health action to limit SHS exposure could also benefit smokers.

Acute Disease↗
PubMed2004

Declines in tobacco brand recognition and ever-smoking rates among young children following restrictions on tobacco advertisements in Hong Kong.

BACKGROUND: We compared the recognition of tobacco brands and ever-smoking rates in young children before (1991) and after (2001) the implementation of cigarette advertising restrictions in Hong Kong and identified continuing sources of tobacco promotion exposure. METHODS: A cross-sectional survey of 824 primary school children aged from 8 to 11 (Primary classes 3-4) living in two Hong Kong districts was carried out using self-completed questionnaires examining smoking behaviour and recognition of names and logos from 18 tobacco, food, drink and other brands common in Hong Kong. RESULTS: Ever-smoking prevalence in 2001 was 3.8 per cent (1991, 7.8 per cent). Tobacco brand recognition rates ranged from 5.3 per cent (Viceroy name) to 72.8 per cent (Viceroy logo). Compared with 1991, in 2001 never-smoker children recognized fewer tobacco brand names and logos: Marlboro logo recognition rate fell by 55.3 per cent. Similar declines were also seen in ever-smoker children, with recognition of the Marlboro logo decreasing 48 per cent. Recognition rates declined amongst both boys and girls. Children from non-smoking families constituted 51 per cent (426) of the sample, whereas 34.5 per cent (284), 8.5 per cent (70), 1.7 per cent (14) and 4.4 per cent (36) of the children had one, two, three or more than three smoking family members at home, respectively. Tobacco brand recognition rates and ever-smoking prevalence were significantly higher among children with smoking family members compared with those without. Among 12 possible sources of exposure to cigarette brand names and logos, retail stalls (75.5 per cent; 622), indirect advertisements (71.5 per cent; 589) and magazines (65.3 per cent; 538) were ranked the most common. CONCLUSION: Advertising restrictions in Hong Kong have effectively decreased primary-age children's recognition of tobacco branding. However, these children remain vulnerable to branding, mostly through exposure from family smokers, point-of-sale tobacco advertisement and occasional promotions. Action to curb these is now required.

Advertising↗
PubMed2004

Identifying barriers to the adoption of evidence-based medicine practice in clinical clerks: a longitudinal focus group study.

OBJECTIVE: To identify and explore common barriers to the adoption of evidence-based medicine (EBM) practice in the undergraduate setting. DESIGN: Nested longitudinal, focus group-based, qualitative study. Setting The University of Hong Kong Medical School, Hong Kong, China. PARTICIPANTS: A group of 39 Year 4 medical undergraduates who participated in an EBM intervention cluster randomised crossover trial. MAIN OUTCOME MEASURES: Students' attitudes, opinions and perceptions of barriers to EBM use. RESULTS: General attitudes towards EBM and the teaching intervention were positive. Four sets of barriers to greater EBM use were identified as follows. (1) Learning environment including prevailing norms for student learning involving examination-oriented, textbook learning, prior availability of clinical practice guidelines, lack of encouragement from teachers and economy of time by utilising teacher expertise. (2) Limitations of evidence consisting of poor point-of-care access to medical literature, difficulty in locating evidence and the perceived low relevance of overseas evidence to Chinese patients. (3) Lack of opportunity to practise EBM due to lack of continuity of care and anxieties about negative teacher attitudes towards EBM use at the point-of-care. (4) Time constraints such as competing study demands and long evidence search time. CONCLUSIONS: Significant barriers to the successful implementation of EBM learning in the clinical clerkship setting were identified. These can be specifically targeted to ameliorate any inhibition of clinical learning they may impose.

Attitude↗
PubMed2003

Understanding sexual risk taking behaviour in Hong Kong university students. A health promotion perspective.

BACKGROUND: Levels of sexual experience among Chinese university students are considerably lower than in western countries. Measuring sexual risk-taking behavior of Chinese students is important in designing any effective preventive health programs. This study assessed the prevalence and factors associated with high-risk sexual behavior among students in a Hong Kong university. METHODS: A cross-sectional survey conducted among year 1 and year 3 Chinese undergraduate students in 1997, using a structured, self-administered questionnaire. RESULTS: Of the 1197 students surveyed, only 11% were sexually active (ever had sexual intercourse). Reported sexual activity was higher among year 3 (17%) than year 1 (6.6%) students and higher among males (14.4%) than females (8.3%). Consistent (always) use of condoms was reported by only 43% of the sexually active respondents. Males were more likely to think that premarital sex was acceptable than were females. About 1 in 20 students (55 of 1197) were categorized as belonging to a "greater risk behavior" group, defined by inconsistent or nonuse of condoms during sexual intercourse and having had three or more sexual partners in the past 3 months, or having has sex with prostitutes or ever having a sexually transmitted disease, or using alcohol or other stimulating drugs during sexual intercourse. Males with favorable attitudes toward premarital sex were more likely to belong to the greater risk behavior group. CONCLUSIONS: This study demonstrated the potential risk for contracting sexually transmitted diseases among a substantial proportion of university students, suggesting the need for promotion of preventive education programs.

Adolescent↗
PubMed2002

Trends in breast cancer incidence in Hong Kong between 1973 and 1999: an age-period-cohort analysis.

Hong Kong has the highest breast cancer incidence in Asia and studying secular changes in its rates may lead to hypotheses regarding disease aetiology and also predictions of future trends for China. We examined statistics from the Hong Kong Cancer Registry based on 26 566 cases of invasive breast cancer from 1973 to 1999. The trends in breast cancer incidence were studied using log-linear longitudinal models. We further analysed the independent effects of chronological age, time period and birth cohort on incidence trends using age-period-cohort modelling. The average annual per cent change of the age-standardised incidence was 3.6% during 1973-1999. Age-period-cohort modelling indicated the incidence development was predominantly a cohort effect, where the rise in relative risk was seemingly linear in successive birth cohorts, showing a 2-3-fold difference when comparing women born in the 1960's with those born around 1900. Our results suggest that direct and indirect consequences of westernisation may have been responsible for most of the observed increase in breast cancer incidence. As China moves towards a more westernised way of life, we can expect an emerging epidemic of breast cancer as Hong Kong's experience has demonstrated.

Adult↗
PubMed2002

Reasons for not using condoms among the Hong Kong Chinese population: implications for HIV and STD prevention.

OBJECTIVE: To assess the prevalence and reasons for non-use of condoms among the Hong Kong Chinese population and obtain baseline data to monitor sexual behavioural change. METHODS: Cross sectional self administered questionnaire surveys in convenience sampled groups of Hong Kong Chinese residents were carried out. RESULTS: Of the 1508 respondents, 24% reported consistent condom use and 76% inconsistent use. Overall, 17% of respondents reported having sex with strangers. People who were at increased risk for inconsistent condom use included STD clinics attendees, those who never married, and those reporting low self efficacy for condom use or sex with strangers. Common reasons for not using condoms were trust in partner, use of other contraceptives, and reduced sensation while using condoms. CONCLUSIONS: Given the reported high prevalence of travel and sexual contact with strangers, and misconceptions about condoms among the Hong Kong Chinese population, innovative condom social marketing campaigns are needed. Periodic monitoring of condom use behaviours should be an integral part of HIV/STD surveillance activity.

Adult↗
PubMed2001

Chinese nasopharyngeal carcinoma patients treated with radiotherapy: association between satisfaction with information provided and quality of life.

BACKGROUND: Nasopharyngeal carcinoma (NPC) is highly prevalent in southern China. Prominent acute side effects of radiotherapy create problems in daily living and working that can generate considerable financial difficulties. A better adjustment to a diagnosis of NPC appears to be associated with an improved rate of recovery, a better quality of life (QoL), a quicker return to work, and normal functioning. Patient satisfaction with physician consultation and the way information is provided in particular may have significant bearing on QoL. The current study reports on short-term QoL after radiotherapy in NPC patients as a function of satisfaction with the information provided. METHODS: Newly referred Hong Kong Chinese NPC patients (n = 211) completed interview measures at baseline before the initiation of radiotherapy, at 4 months after baseline (immediate posttreatment consultation) (FU 1), and again at 8 months (short-term postradiation period) after baseline (FU 2). Satisfaction with the information provided was measured by five items selected from the cognitive subscale of the Medical Interview Satisfaction Scale (MISS). QoL was measured by the Chinese version of the Functional Assessment of Cancer Therapy-General Scale (FACT-G (Ch)). RESULTS: After adjustment for overall patient satisfaction (the PSQ-9), optimism, worry about family, anger, eating ability, subjective health, family income, and occupation at FU 1, treatment between baseline and FU 1, and disease recurrence after baseline, the 5-item MISS at FU 1 (beta = 0.21, P < 0.01) was found to significantly predict patient QoL at FU 2. Adjustment for baseline QoL and disease stage did not appear to alter this relation (beta = 0.20, P < 0.01). CONCLUSIONS: To the authors' knowledge, there is very little research concerning NPC. The results of the current study reinforced the need to improve physicians' information provision during consultations with Chinese NPC patients shortly after the end of treatment.

Analysis of Variance↗
PubMed2001

Preliminary evaluation of "interpreter" role plays in teaching communication skills to medical undergraduates.

RATIONALE AND OBJECTIVES: Multiculturalism presents linguistic obstacles to health care provision. We explored the early introduction of "interpreter" role-play exercises in teaching medical undergraduates communication skills. The interpreter role creates a natural barrier in communication providing an active prompt for recognizing learning needs in this area. METHODS: Bilingual Cantonese first-year medical students (n=160) were randomly allocated to either "Observer" or "Interpreter" role plays at a small-group introductory communication skills workshop using a quasi experimental design, counterbalanced across tutors. Students assessed their own skill competence before and, together with their perceptions of the different role plays' effectiveness, again after the workshop, using an anonymous 16 item Likert-type scale, analysed using ANOVA and MANOVA. RESULTS: Students' assessments of their skills improved significantly following the workshop (F=73.19 [1,156], P=0.0009). Students in the observer group reported greater changes in their scores following the workshop than did students in the interpreter group (F=4.84 [1,156], P=0.029), largely due to improvement in perceived skill (F=4.38 [1,156], P=0.038) rather than perceived programme effectiveness (F=3.13 [1,156], P > 0.05). Subsequent MANOVA indicated no main effect of observer/interpreter conditions, indicating these differences could be attributed to chance alone (F=1.41 [16 141], P > 0.05). CONCLUSION: The workshop positively influenced students' perceived communication skills, but the "Interpreter" role was less effective than the "Observer" role in achieving this. Future studies should examine whether interpreter role plays introduced later in the medical programme are beneficial.

Analysis of Variance↗
PubMed2001

The impact of mastectomy, breast-conserving treatment and immediate breast reconstruction on the quality of life of Chinese women.

BACKGROUND: The psychosocial impact of breast surgery has been extensively studied in the Western population. There is a relative paucity of comparable data in Oriental women who are increasingly affected by cancer of the breast. The present study investigates the effects that different types of breast surgery have on the quality of life of Chinese women. METHODS: Forty-nine Chinese women with early breast cancer were interviewed at 6 months-2 years following their primary surgery (breast-conserving treatment (BCT, 17 patients), mastectomy (15 patients) and mastectomy with immediate breast reconstruction (17 patients)). Aspects of quality of life measured included general psychological well-being, body image, sexual functioning and social functioning. RESULTS: Patients who received BCT had significantly better body image scores compared to mastectomy patients. They were less worried about their appearance, had more freedom in the choice of clothing, felt less upset by the change in their body and felt more accepted by their partners. The three groups did not differ significantly in the other aspects of quality of life measured. CONCLUSIONS: Compared to mastectomy or mastectomy and immediate breast reconstruction, the most significant benefit of BCT is the preservation of a better body image.

Adult↗
PubMed2001

The activity of low-clearance liposomal amikacin in experimental murine tuberculosis.

Most of the amikacin in low-clearance liposomal amikacin is excreted very slowly, offering the possibility of maintaining effective treatment of pulmonary tuberculosis with widely separated supervised doses. As a preliminary to explorations in humans, its efficacy was assessed in acute experimental murine tuberculosis by weekly counts of viable bacilli in spleen and lungs over a 4 week period. Liposomal amikacin in dosages of 160, 80 and 40 mg/kg given iv three times a week was 2.4-5.0 times more active than free amikacin and 6.6-6.7 times more active than streptomycin with the non-liposomal drugs given im five times a week. When the free amikacin and the streptomycin were also given iv three times a week, liposomal amikacin was 2.7-2.9 times more active than free amikacin and 3.7-5.6 more active than streptomycin. In a model of chronic tuberculosis, initial BCG vaccination was followed by challenge with virulent Mycobacterium tuberculosis and a 2 week stabilization period. Thereafter, treatment with liposomal amikacin 160 and 80 mg/kg three times a week for the first 4 weeks and then once a week for a further 4 weeks, had greater initial bactericidal activity than free amikacin 160 mg/kg five times a week, but had less eventual sterilizing activity than five times a week oral isoniazid 25 mg/kg or rifampicin 15 mg/kg. Although low-clearance liposomes increased the safety, potency and dosing interval of amikacin in these models, all aminoglycosides, including liposomal amikacin, were only bactericidal in the presence of bacillary metabolism and growth.

Amikacin↗
PubMed2000

Environmental tobacco smoke exposure among police officers in Hong Kong.

CONTEXT: Few epidemiological studies have examined the relationship between chronic respiratory symptoms and exposure to environmental tobacco smoke (ETS) at work in adults, and none have shown clear dose-response relationships. OBJECTIVE: To examine the respiratory effects of ETS exposure at home and at work among never-smoking adults. DESIGN, SETTING, AND PARTICIPANTS: Cross-sectional, self-administered questionnaire survey conducted in December 1995 and January 1996 among 4468 male and 728 female police officers in Hong Kong who were never-smokers. MAIN OUTCOME MEASURES: Respiratory symptoms and physician consultation in the previous 14 days for such symptoms by presence and amount of ETS exposure at work. RESULTS: Eighty percent of both men and women reported ETS exposure at work. Significant odds ratios (ORs) for respiratory symptoms were found among men with ETS exposure at work (for any respiratory symptoms, difference in absolute rate, 20.4%; OR, 2.33; 95% confidence interval [CI], 1.97-2.75; attributable risk, 57%) and physician consultation (difference in absolute rate, 4.5%; OR, 1.30; 95% CI, 1. 05-1.61; attributable risk, 23%). Trends were similar among women for any respiratory symptoms (difference in absolute rate, 15.4%; OR, 1.63; 95% CI, 1.04-2.56; attributable risk, 39%) and for physician consultation (difference in absolute rates, 2.8%; OR, 1.45; 95% CI, 0.87-2.41; attributable risk, 31%). Positive dose-response relationships with number of coworkers smoking nearby and amount of ETS exposure in the work place were found. CONCLUSIONS: This study provides further evidence of the serious health hazards associated with ETS exposure at work. The findings support a ban on smoking in the workplace to protect all workers in both developed and developing countries. JAMA. 2000;284:756-763

Adult↗
PubMed2000

Measuring quality of life of Chinese cancer patients: A validation of the Chinese version of the Functional Assessment of Cancer Therapy-General (FACT-G) scale.

BACKGROUND: Few cancer specific quality-of-life (QoL) measures from the West have been translated for use with Chinese-speaking patients, and no substantial validation of these translations with adequately large cohorts has been published previously, to the authors' knowledge. The Functional Assessment of Cancer Therapy-General (FACT-G) is a well-validated QoL instrument that is specific to cancer patients. The scale was translated into Chinese and the psychometric properties of this translated scale (FACT-G [Ch]) were tested with a Chinese sample in Hong Kong, China. METHODS: A total of 1262 Chinese cancer patients were selected in 3 samples from 5 Hong Kong regional hospitals. Quantitative and qualitative data were used to assess the cultural equivalence, factor structure, reliability, and validity of the FACT-G (Ch). RESULTS: Focus group discussions indicated that the FACT-G was seen as covering QoL domains identified as important and relevant to Chinese cancer patients, though in some respects it was seen as having limited scope in this sample. Psychometrically, the factor structure of the FACT-G deviated from that of the original work. The FACT-G (Ch) had acceptable reliability (Cronbach alpha 0.85). The convergent validity of the FACT-G (Ch) with a generic QoL measure (WHOQOL-BREF[HK]) was 0.72 (P < 0.001), and divergent validity showed low correlations of less than 0.15 (P < 0.05) with non-QoL measures. CONCLUSIONS: Focus group data indicated that the FACT-G translation into Chinese was seen as a conceptually relevant and moderately sufficient QoL measure. Psychometrically, the instrument had acceptable properties, but conceptual differences from the original version were suggested. Although more work is needed to increase its adequacy, the translated scale has reasonable utility for use with Chinese populations in clinical settings.

Adult↗
PubMed2000

Passive smoking at work: the short-term cost.

STUDY OBJECTIVE: To estimate the impact of passive smoking at work on use of health care services and absenteeism. DESIGN: Cross sectional survey. SETTING: A workforce in Hong Kong. PARTICIPANTS: 5142 never-smoking police officers in a total sample of 9926. MAIN RESULTS: A consistently strong association was found among men between length of time exposed to passive smoking at work and self reported consultations with a doctor, use of medicines and time off work. Results for women were similar but most were not statistically significant. CONCLUSIONS: The exposure of healthy adults to passive smoking at work is related to utilisation of health care services and extra time off work. This results in costs to the health services, to employers and to those exposed.

Absenteeism↗