Depression and work performance: an ecological study using web-based screening.

BACKGROUND: Depression is reported to be a major cause of illness-related sub-optimal work performance (presenteeism). However, the majority of studies examining presenteeism have relied on self-report measures of work performance. Furthermore, employers currently face a number of practical challenges in attempting to facilitate early identification of depression. AIMS: To test whether a web-based screening tool for depression could be used successfully in the workplace and whether it was possible to detect an association between rates of depression and objective measures of impaired workgroup performance. METHODS: All permanent employees of a telecommunications company with UK-based call centres were encouraged to complete a web-based psychological assessment using the Patient Health Questionnaire depression scale (PHQ-9). In addition to confidential individual level results, the tool was able to provide anonymized summary statistics for each workgroup. Four objective measures of work performance were collected for each workgroup. RESULTS: During the study period, 1161 web-based PHQ-9 questionnaires were completed. There was a negative linear relationship between rates of depressive symptoms and the overall performance of a workgroup (P < 0.001). The linear relationship between depression and workgroup performance remained after controlling for gender balance, percent of temporary staff, employees' perceived level of engagement and satisfaction with their line manager (P < 0.01). CONCLUSIONS: Workgroups with high levels of depressive symptoms tend to perform poorly. Computer-aided web-based screening for symptoms of depression is feasible in a work setting.

Screening for malignant melanoma using instant photography.

OBJECTIVE: To assess the use of instant photography, in addition to clinical grading, as a method of screening for malignant melanoma during routine health examinations. SETTING: A health screening clinic with an average throughput of about 12,000 patients a year. METHODS: Suspicious pigmented skin lesions were judged clinically using the revised seven point checklist scoring system. They were then photographed with a Polaroid camera and the prints were graded independently by two consultant dermatologists with a special interest in malignant melanoma. A copy of the print was also given to the patient to keep for observation of any change in the lesion. RESULTS: Over a 45 month period 39,922 patients of both sexes were screened and 1052 skin lesions were clinically assessed and photographed. Fourteen malignant melanomas were diagnosed--all, except one, were thin lesions with a good prognosis. CONCLUSIONS: The clinical opinions of non-dermatologists using the revised seven point checklist proved disappointing in screening because of the large number of benign lesions that were given high scores. Photography, on the other hand, detected 11 melanomas and succeeded in separating the majority of banal lesions from potentially malignant ones, thus greatly reducing the need for specialist referral. Nevertheless, three melanomas were missed on purely photographic grading, which emphasises the danger of placing too much reliance solely on a two dimensional image. Finally, the possession of a personal copy of the photograph by the patient proved popular and led to a diagnosis of melanoma in two instances. This procedure merits further study.

The effects of cigarette smoking and alcohol consumption on blood lipids: a dose-related study on men.

The separate and joint effects of cigarette smoking and alcohol consumption on serum concentrations of total cholesterol, high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C) and triglycerides were investigated in 46 750 men attending the BUPA Health Screening Centre in London during the period 1983-1987, after allowing for differences in age, body mass index and exercise level. Drinking alcohol was found to raise both total cholesterol and HDL-C concentrations, in such a way that HDL-C as a percentage of total cholesterol increased with increasing alcohol consumption. LDL-C concentrations increased with increasing alcohol consumption in non-smokers, but decreased in those smoking over 10 cigarettes per day. Drinking had no significant effect on triglycerides except at high levels of consumption. Smoking raised total cholesterol, LDL-C and triglycerides, but lowered HDL-C concentrations. In particular, smoking even small amounts could negate any protective benefit in HDL-C concentrations gained from moderate consumption of alcohol. Assuming a desirable lipid profile to consist of low total cholesterol, LDL-C and triglycerides and a high HDL-C value, this is best achieved for men by being a non-smoking moderate drinker.

The effects of cigarette smoking and alcohol consumption on serum liver enzyme activities: a dose-related study in men.

The separate and joint effects of cigarette smoking and alcohol consumption on serum activities of the enzymes aspartate aminotransferase (AST), alanine aminotransferase (ALT) and gamma-glutamyl transferase (GGT) were investigated in 46,775 men attending the BUPA Health Screening Centre in London during the period 1983-1987, after allowing for differences in age, body mass index and exercise level. As expected, all showed a significant positive correlation with alcohol consumption. Cigarette smoking produced a significant increase in GGT activity in all drinking categories bar teetotallers, particularly for those smoking more than 20 cigarettes per day. There were no changes of clinical significance in AST or ALT activities with smoking. We postulate that the combined effects of alcohol and smoking on GGT activity are a result of induction of the enzyme by both alcohol and nicotine. Smoking as well as drinking habits should be taken into account when assessing the significance of an individual's enzyme activities.

Health risk appraisal in the UK--some preliminary results.

Information about a subject's lifestyle, personal past history and family history of disease is obtained from a 70-item questionnaire. This information is then used to compute the subject's risk of dying from certain diseases, relative to the average risk for a person of the same age and sex.

Bone density, biochemistry and life-style.

We have assessed the relationship between bone density, biochemistry and life-style factors in a cross-sectional study of 434 pre- and 357 postmenopausal women. Bone-mineral content (BMC) was measured in the non-dominant forearm using single-photon densitometry. Bone mass was corrected for bone size (BMC2) in a sub-set of 263 subjects. Correlation statistics and multiple regression analyses were used to identify physical and biochemical measurements that could be used to best predict BMC or BMC2. These were combined with lifestyle factors, using multiple logistic regression analysis, to identify women at risk of low bone density. Cut-off values were taken as the 5th percentile of the bone density distributions in pre-menopausal women. In postmenopausal women, using BMC2 values to define "risk", and using age, creatinine, alkaline phosphatase, thyroxine treatment, and calcium supplementation as predictors, a sensitivity of 73% and a specificity of 95% were achieved. Such a model may be of use as a "first pass" screening test for osteoporosis.

Detection of alcohol-induced fatty liver by computerized tomography.

Computerized tomographic (CT) scanning of the liver was undertaken in 17 occasional and 19 heavy drinkers undergoing health screening. The median attenuation value of the liver (CT number) in occasional drinkers with normal liver function tests was 54.4 compared with 25.9 in the heavy drinkers (P less than 0.001). Fourteen of the heavy drinkers had a CT number below the lowest value observed in occasional drinkers with normal liver function, indicating reduced liver density due to fatty change. Serum gamma-glutamyl transpeptidase was normal in 36% of these individuals. A rise in CT number was observed in 4 out of 5 heavy drinkers who underwent a second scan after decreasing their alcohol consumption. These findings suggest that CT scanning provides a noninvasive and convenient method of screening for a fatty liver, which occurred to a variable degree in over 70% of the men who admitted to regularly taking 8 or more alcoholic drinks per day.

Serum gamma-GTP levels by type and quantity of alcohol consumed--the 'whisky hypothesis' refuted.

Serum gamma-GTP measurements in 11,755 Japanese men were used to test the hypothesis that drinking whisky had little or no effect on the serum level of this enzyme. We found that regular drinking was associated with significantly increased mean levels and raised percentages of high values of gamma-GTP, irrespective of the type of alcohol consumed. Moreover, heavier and more frequent drinking were associated with proportionately greater increases in gamma-GTP levels. Our data therefore refute the hypothesis that whisky drinking is not accompanied by adverse changes in the level of serum gamma-GTP.

An analysis of arterial disease mortality and BUPA health screening data in men, in relation to outdoor temperature.

1. Laboratory studies have shown that cold exposure causes an increase in blood pressure, cholesterol and erythrocyte count. However, whether the mild cold exposures received during everyday life are sufficient to cause such changes is unclear. 2. To test this, outdoor temperatures in central London between 1986 and 1992 were related to both haematological and blood pressure data on 50-69-year-old men attending BUPA health screening examinations in London, and to mortality in South-East England. Since any association with temperature may be an artifact due to common, temperature-independent, annual rhythms in the parameters, these data were also analysed after removal of these circannual components by digital filtering. 3. It was found that short-term falls in temperature produced significant increases in Hb, erythrocyte count, packed cell volume, mean corpuscular Hb concentration, serum albumin, systolic and diastolic blood pressure, and significant decreases in mean corpuscular volume and erythrocyte sedimentation rate. Mean corpuscular Hb, leucocyte count, platelet count and serum cholesterol concentrations were unchanged. Time-series analysis showed that these changes occurred almost immediately in response to a fall in temperature, but persisted for longer intervals of up to 1-2 days. 4. Mortalities from ischaemic heart disease and cerebrovascular disease were also significantly increased by short-term falls in temperature. 5. These finding indicate that in the general population the cold exposures of normal life are sufficient to induce significant and prolonged haemoconcentration and hypertension, which may explain why deaths from arterial disease are more prevalent in the winter.

Cigarette smoking, sex hormones and bone density in women.

It is known that among women over the age of 65, bone mineral density is lower, and the risk of hip fracture higher, in smokers than non-smokers. We report a study in 1334 health pre- and post-menopausal women aged 35-64 years, to determine whether this effect can be attributed to lower oestrogen levels in smokers. Among 676 premenopausal women forearm bone density was no lower in smokers (95% confidence interval 1% lower, 4% higher). Among 543 postmenopausal women who had not used hormone replacement therapy (HRT) for more than a year there was no statistically significant difference, but the lower confidence interval was consistent with a lower bone density in older smokers (by 8% at age 55-59, 16% at age 60-64). Measurements in 194 postmenopausal women not taking HRT showed that oestrone and oestradiol were similar in smokers and non-smokers, as were cortisol and FSH, LH and prolactin. Meta-analysis of the present study and previous studies confirmed significantly higher levels in smokers of the androgens DHEAS (by 37%) and androstenedione (by 34%). Oestrogens were no lower in smokers, and the lower confidence limit excluded more than a trivial effect of smoking in lowering oestrogen. These results indicate that the recognised lower bone density in elderly smokers cannot be explained by an effect of smoking on oestrogen, since in premenopausal women bone density is no lower in smokers and in postmenopausal women oestrogens are no lower in smokers. The data suggest a balance between higher androgen levels but lower rates of conversion of androgens to oestrogens in smokers. The effect of smoking on bone may be due to impaired response of bone and other target organs to oestrogen, or to actions independent of oestrogen.

The effects of cigarette smoking and alcohol consumption on blood haemoglobin, erythrocytes and leucocytes: a dose related study on male subjects.

The objective of this study was to quantify the combined dose related effects of cigarette smoking and alcohol consumption on blood haemoglobin concentration, erythrocytes and leucocytes. The subjects consisted of 17,670 males attending for routine health screening, with an average age of 43 years and a range of 16-91 years. The number of cigarettes smoked each day was divided into six categories, and declared alcohol consumption into seven. Of the 42 different combinations of smoking and drinking groups, five were not reported because they contained less than 30 subjects. Haemoglobin concentration was significantly increased in those smoking more than 10 cigarettes per day. Smoking also increased the PCV. Alcohol had no effect on Hb or PCV. The red cell count was reduced by alcohol consumption, with even the lowest consumption producing a significant decrease. Both smoking and drinking raised the MCV in a linear dose relationship. The marked increase in white cell count with smoking was seen even in subjects smoking 10 cigarettes per day or less. It is suggested that social habits such as smoking and drinking should be considered when interpreting blood haematology values. Changes in haematology results could be used to encourage a healthier lifestyle.

Effect of red wine ingestion on the antioxidant capacity of serum.

Aerobic metabolism in biological systems produces reactive oxygen species, and defense against such prooxidants requires antioxidant activity, e.g., predominantly vitamins C and E in serum. Recently, flavonoids (polyphenols occurring widely in plants) have been investigated in vitro for their antioxidant activity; whether they are absorbed after ingestion is not clear. Using a chemiluminescent assay of serum antioxidant capacity (SAOC), we have studied the effects in normal individuals of ingesting red wine, white wine, and high doses of vitamin C. In nine subjects who ingested 300 mL of red wine, the mean SAOC was increased by 18% after 1 h and by 11% at 2 h. The same amount of white wine produced 4% and 7% increases, respectively. The ingestion of 1000 mg (5.7 mmol) of ascorbic acid by four subjects increased their mean SAOC by 22% at 1 h and by 29% at 2 h. An in vitro comparison of red wine, white wine, and various fruit juices showed the high antioxidant capacity of red wine in addition to its ability to increase the antioxidant capacity of serum in vivo. The antioxidant effects of various flavonoids and other polyphenols were also studied.