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Biomedical subjects

I M Marks

Publications and source records attributed to I M Marks.

At least 73 records · Page 4Linked to original sources
PubMed1988

Clomipramine in obsessive-compulsive ritualisers treated with exposure therapy: relations between dose, plasma levels, outcome and side effects.

Forty-nine obsessive-compulsive ritualisers completed a double-blind controlled study of clomipramine and exposure therapy. More severely ill patients allowed higher doses of medication to be prescribed and had higher plasma levels of both clomipramine and desmethylclomipramine. Exposure instructions had a strong effect, whereas the clomipramine effect was small and short-lived. Plasma levels of desmethylclomipramine but not of clomipramine correlated with outcome at weeks 8 and 17. There was no evidence of a therapeutic window for either clomipramine or its metabolite. Patients' physical complaints before treatment correlated positively with depression and anxiety, especially sexual difficulties. Dry mouth, as a side effect, was most evidently related to clomipramine and its usefulness in monitoring drug compliance for patients on clomipramine is reaffirmed.

Adolescent↗
PubMed1988

Urinary cortisol during exposure in obsessive-compulsive ritualizers.

Nineteen obsessive-compulsive (OC) ritualizers were exposed to both brief and prolonged neutral and aversive stimuli (the latter evoked a significant urge to ritualize). Urinary cortisol and subjective anxiety were measured over 3 1/2 hours throughout the experiment, and cortisol secretion was compared to a control session the previous day. Both groups showed higher cortisol secretion after exposure compared to the control session. Only the group that received prolonged aversive stimuli, in addition to brief aversive and neutral stimuli, showed significantly higher urinary cortisol levels after the session. Cortisol response correlated with subjective anxiety reports during prolonged aversive stimulation only.

Adolescent↗
PubMed1988

Obsessive-compulsive beliefs and treatment outcome.

Of 49 compulsive ritualizers one-third perceived their obsessive thoughts as a rational and felt that their rituals warded off some unwanted or feared event (the content of their obsessions). The more bizarre the obsessive belief the more strongly it was defended and 12% of cases made no attempt to resist the urge to ritualize. Neither fixity of belief nor resistance to compulsive urges were related to duration of illness. Patients with bizarre and fixed obsessive beliefs responded as well to treatment (all but three received exposure), as did patients whose obsessions were less bizarre and recognized as senseless. There was no difference in outcome between patients who initially found it hard to control their obsessions or never resisted the urge to ritualize and those who initially could control obsessions or resist rituals. One year after starting treatment, patients whose obsessions and compulsions had improved with treatment recognized their irrationality more readily and controlled their compulsive urges more easily. Beliefs appeared to normalize as a function of habituation.

Adult↗
PubMed1988

Computer-supervised exposure treatment for phobias.

Twenty phobic outpatients were treated by 9 weekly "interviews" at the console of a desk computer. Using a conversational style and multiple choice questions, the computer assessed the symptoms and agreed a hierarchy of self-exposure tasks. Each week the patient was given a diary sheet of tasks to practise daily. At his next visit his progress and motivation were assessed, and if he was succeeding he was encouraged to accept progressively more difficult tasks. This group was compared with a group of 20 patients (matched for age, sex and type of phobia) treated conventionally by a therapist in the preceding year. Progress was measured on standardized scales (both self- and clinician-rated). The two groups showed significant improvement on all the scales, and 75-80% of each group were much improved (scores reduced by 50%). The therapist treated group tended to be more severely ill at entry and to show greater improvement during treatment. Improvement was maintained at 6 month follow-up in both groups.

Adult↗
PubMed1988

Therapist contact and outcome of self-exposure treatment for phobias. A controlled study.

Eighty-four chronic phobic patients were randomly assigned to self-exposure in vivo instructed by either a psychiatrist, a computer or a book; mean therapy time per patient was respectively 3.1, 3.2 and 0 hours. Seventy-one patients completed treatment. All three groups improved substantially and similarly to 6 months follow-up, with no significant difference between them; self-exposure treatment was effective even without therapist contact. Among the three groups, initial expectation of help and positive attitude to the psychiatrist were equally high and related to subsequent rating of help received. All three groups rated the psychiatrist as more tolerant, reliable, and understanding than the computer or book, but these attitudes did not relate to outcome, were initially similar among all three groups, and changed minimally at 6 months follow-up.

Adolescent↗
PubMed1988

Clomipramine, self-exposure and therapist-aided exposure for obsessive-compulsive rituals.

A randomised treatment design for 49 chronically obsessive-compulsive ritualising patients was devised and three controlled comparisons were made. 1. During 7 weeks of self-exposure instructions, clomipramine treatment improved some measures of rituals and depression significantly more than did placebo medication; this effect was transient and disappeared as drug treatment and exposure were continued for a further 15 weeks. 2. During 11-16 weeks of clomipramine treatment, self-exposure instructions yielded highly significantly more patient improvement than did anti-exposure instructions on nearly all measures of rituals and some of social adjustment. 3. Adding therapist-aided exposure (1.3 hours) to self-exposure instructions (3 hours) after 8 weeks had a barely significant transient effect of dubious clinical value, which was lost by the end of exposure (at week 23) and during follow-up assessments to week 52. We conclude that of the three therapeutic factors tested, self-exposure was the most potent; clomipramine played a limited adjuvant role, and therapist-aided exposure a marginal one.

Adolescent↗
PubMed1987

Relationship of skin conductance activity to clinical features in obsessive-compulsive ritualizers.

Before treatment 49 obsessive-compulsive (o-c) ritualizers were presented with two series of brief stimuli--15,100db tones (brief neutral) and 15 presentations of a ritual-evoking object (brief aversive). Habituation of skin conductance (SC) responses to the tones was reduced compared with that previously found in normal subjects. Neither habituation rates to tones nor aversive stimuli were related to coexisting anxiety or depression or to the severity of o-c symptoms. The increased arousal induced by the aversive stimuli was sustained, that induced by the tones was short-lived and SC level and subjective anxiety had returned to resting levels by the end of the tone series. Concordance between SC activity and subjective anxiety was much greater during and after the presentations of ritual evoking stimuli than of tones. There were few correlations between SC and clinical measures, though patients who strongly resisted and were able to control their compulsive urges were more aroused.

Anxiety Disorders↗
PubMed1987

Agoraphobics 5 years after imipramine and exposure. Outcome and predictors.

Five years after treatment in a controlled trial, in which all had received self-exposure homework, a group of 40 agoraphobic outpatients retained marked improvement in agoraphobia, mood, and free-floating anxiety. Frequency of spontaneous panics decreased as much in those who had placebo and self-exposure as in those who received imipramine and self-exposure. Few patients, however, were completely well at 5 years and over half had received further treatment for agoraphobia during the follow-up. Patients who were still highly phobic at the end of the clinical trial were more often prescribed psychotropic medication during follow-up and remained phobic at 5 years. Phobic improvement had generalized more in those patients with very low than in those with moderate pretreatment Hamilton depression scores. Frequency of initial spontaneous panics did not predict outcome. Improvement in agoraphobia was associated with improved marital adjustment. Those who began with the best marital, work, and social adjustment were more improved in their phobias 5 years later.

Adult↗
PubMed1987

Behavioral aspects of panic disorder.

The behavioral approach to panic disorder distinguishes between agoraphobia and nonsituational panic and emphasizes the handicap to the patient caused by avoidance of agoraphobic situations. Agoraphobia is a more viable label than panic disorder. Behavioral treatment consists of delineating the patient's agoraphobic avoidance and panic profile and developing a self-exposure program to produce habituation. Systematic exposure to agoraphobic situations is usually of durable efficacy, and the treatment requires little time from clinicians. Antidepressant drugs, which do not interfere with exposure, are a useful addition when dysphoria is present, but they can have troublesome side effects.

Adult↗
PubMed1987

Anorgasmia from clomipramine in obsessive-compulsive disorder. A controlled trial.

Forty-six patients with obsessive-compulsive disorder undergoing a double-blind controlled study of clomipramine and placebo were interviewed to assess changes in sexual function. Of 33 patients with previously normal organism, nearly all of the 24 on clomipramine developed total or partial anorgasmia; none of the 9 on placebo did so. Anorgasmia persisted with minimal tolerance over the five months that clomipramine was taken. Men and women were equally affected. Sexual side-effects are easily missed without a structured interview, and can detract from the value of drug treatment.

Clinical Trials as Topic↗
PubMed1986

Neurological factors in obsessive compulsive disorder. Two case reports and a review of the literature.

Two patients are described in whom an obsessive-compulsive disorder began just after the onset of epilepsy. Neurological factors in OCD are then reviewed, and clinical reports of patients with OCD and co-existing brain pathology, EEG abnormalities, CT scan changes and electrical stimulation of the brain discussed. It is concluded that neurological factors are present in only a minority of cases of OCD. Successful behavioural treatment is independent of such factors.

Adolescent↗
PubMed1986

Genetics of fear and anxiety disorders.

From protozoa to mammals, organisms have been selectively bred for genetic differences in defensive behaviour which are accompanied by differences in brain and other biological functions. Studies of twins indicate some genetic control of normal human fear from infancy onwards, of anxiety as a symptom and as a syndrome, and of phobic and obsessive-compulsive phenomena. Anxiety disorders are more common among the relatives of affected probands than of controls, especially among female and first-degree relatives; alcoholism and secondary depression may also be over-represented. Familial influences have been found for panic disorder, agoraphobia, and obsessive-compulsive problems. Panic disorder in depressed probands increases the risk to their relatives of phobia as well as of panic disorder, major depression, and alcoholism. The strongest family history of all anxiety disorders is seen in blood-injury phobia; even though it can be successfully treated by exposure, its roots may lie in a genetically determined specific autonomic susceptibility. Some genetic effects can be modified by environmental means.

Adult↗
PubMed1985

Marital adjustment and treatment outcome in agoraphobia.

Forty agoraphobics had individual exposure treatment over a period of 28 weeks and were followed up for two years. Outcome in the 27 married patients was as favourable as that in the 13 single patients. However, among the married patients greater improvement occurred in those with better initial marital and sexual adjustment, although even those with poor initial marital adjustment improved significantly during treatment and maintained that improvement during follow-up. Good initial work adjustment and social adjustment were also predictive of particularly good outcome. Reduction of phobias was accompanied by stable or improved marital, sexual, social and work adjustment.

Adaptation, Psychological↗
PubMed1984

Controlled study of self-exposure treatment for phobics: preliminary communication.

Patients with phobic disorder (mainly agoraphobics ) of minimum one year duration were treated by self-administered exposure in vivo treatment. Seventy-one patients were randomly assigned to one of three groups: (A) book-instructed, (B) computer-instructed, or (C) therapist-instructed. All three groups improved significantly to a similar extent on various phobic measures at the end of the treatment and maintained their treatment gains at 6-month follow up. Mean clinicians' time spent with each patient was 40 minutes, 4.2 hours and 3.2 hours in group A, B and C respectively. Similar small numbers of patients defaulted from each group.

Adolescent↗
PubMed1984

Two-year follow-up of agoraphobics after exposure and imipramine.

Forty-five agoraphobic out-patients were randomly assigned to treatment with imipramine or placebo, and also to brief therapist-aided exposure or relaxation. All patients did systematic self-exposure homework and recorded this in a diary. Forty of these patients were followed-up two years later with self-ratings and ratings by interviewers blind to their treatment conditions. About two-thirds of the patients remained improved or much improved in their phobias, with no significant difference between any of the four treatment conditions. Spontaneous panics also remained improved. The absence of an imipramine effect may reflect the lack of initial dysphoria (anxiety-depression) in this sample compared with other studies where drug-effects have been found. The post-treatment superiority (evident at week 28) of patients who had therapist-aided exposure was no longer present at the two-year follow-up; the others had caught up, presumably because of their self-exposure homework.

Adult↗