Blood pressure (BP) during siesta declines to levels similar to those of night time sleep. The objective of the study was to assess the effect of siesta on 24-h ambulatory BP (ABP) data. Two different approaches were employed for the definition of day and night periods: (1) actual patient reported day and night intervals (ACT) with siesta period analysed as a third time period; and (2) arbitrary day and night time intervals (ARB) with the presence of siesta being ignored. A total of 203 24-h ABP recordings were analysed, with a siesta during ABP monitoring reported in 154 of them. Mean siesta BP was very close to ACT night time BP. Among recordings with a siesta, ACT daytime BP was higher and night time BP lower than the corresponding ARB BPs (P < 0.001). The magnitude of night time BP drop was greater with ACT intervals, resulting in a lower percentage of non-dippers (P < 0.001). Among 49 recordings without a siesta, differences between ACT and ARB BPs were less pronounced for daytime but not for night time. Differences in the magnitude of nocturnal BP drop between ACT and ARB periods, although statistically significant, did not affect the prevalence of non-dippers. In conclusion, analysis of 24-h BP profiles by using ARB instead of ACT day and night intervals results in underestimation of the nocturnal BP drop and overestimation of the proportion of non-dippers. This bias is more pronounced in patients who take a siesta during ABP monitoring.

It has consistently been reported that older AIDS patients have a shortened survival compared with younger patients. The aim of the present study was to investigate whether this difference in survival is caused by differences in the pattern of the complicating diseases. Information on patient follow-up after the AIDS diagnosis was obtained by retrospective case note review. The 6,546 patients were followed from the time of AIDS diagnosis as part of the multicentre AIDS in Europe study, which examined AIDS cases diagnosed at 52 centres in 17 European countries between 1979 and 1989. Occurrence of AIDS-defining events and demographic variables were recorded for all patients, and CD4 lymphocyte count at the time of AIDS diagnosis for approximately half the patients. After adjusting for imbalances in other variables, persons > or = 50 years of age had a significantly higher risk of contracting AIDS wasting syndrome, AIDS dementia complex and oesophageal candidiasis after the initial AIDS diagnosis, compared with age group 30-39 years [relative risk (RR) 95% confidence interval (CI)], 3.23 (2.70-3.75 CI); 2.48 (2.16-2.80 CI); 1.55 (1.26-1.83 CI), respectively]. Shortened survival after the time of AIDS diagnosis was associated with older age. After adjusting for pattern of complicating diseases, the age effect remained unchanged. Older age predisposes to AIDS-related wasting syndrome, AIDS dementia complex and oesophageal candidiasis. Independent of these differences, older age is significantly associated with shortened survival, suggesting that factors such as severity of complicating diseases or the capability of handling serious infections, rather than disease pattern, are responsible for the shortened survival.

To investigate the reliability of home blood pressure (HBP) measurement as it is generally used in practice, we studied 50 consecutive newly referred hypertensive patients that were measuring HBP for at least 6 months before referral. No specific instructions on the technique of HBP measurement were given to the patients. HBP was compared to clinic BP (CBP) by using daytime ambulatory BP (ABP) as a reference method. The technique of HBP measurement used by the patients was assessed on the basis of a detailed questionnaire and the accuracy of the devices was tested against a mercury column. There was no difference between the degree of similarity of ABP with HBP or CBP (mean value of discrepancies and correlation coefficients) for systolic BP (SBP) and little difference for diastolic BP (DBP). However, the variability of discrepancies between HBP and ABP was equal to the corresponding variability between CBP and ABP, indicating that HBP was not better predictor of ABP than CBP. Although patients measured HBP more frequently than generally recommended, poor standardisation of measurement and wrong technique were particularly common. In conclusion, in the present study HBP measurement offered no advantage over CBP in predicting ABP. The theoretical advantages of HBP may be partially offset by incorrect technique and less standardised conditions of measurement. Without patients education and regular maintenance of devices HBP offers no advantage over CBP and should not be used. (This article is based on data presented at the 7th European Hypertension Society Meeting in Milan, June 1995).

One hundred and seventy-four patients with advanced colorectal cancer were treated with 5-fluorouracil (5-FU), mitomycin-C (MIT-C) and Adriamycin (ADR) (FAM). The total response rate was 26.4%. A higher response rate (37%) was observed in patients with liver metastases only, compared to other sites of metastases (p < 0.02). Complete remission were achieved only in patients with liver metastases (15%). Male patients with liver metastases had a higher response rate than females (p < 0.03). Twenty-five patients previously treated unsuccessfully with 5-FU and MIT-C showed a response rate of 28% when ADR was added to the regimen. The patients' median survival was 11 months (range: from 3 to > or = 60 months). The median survival of patients with liver metastases was 11 months and that of responders (20 months) was significantly longer than that of nonresponders (7 months; p < 0.0001). These results suggest that the FAM combination might be considered an eligible chemotherapy schedule for patients with liver metastatic disease from colorectal cancer.

The effect of the cytotoxic drug 5-fluorouracil (5-FU) on plasma lipid levels was studied in patients and animals. Seven patients with metastatic carcinoma of the colon and three with advanced breast cancer were treated with 5-FU monotherapy by i.v. push at a dose of 500 mg/m2/d for 3-5 consecutive days. The animal group comprised 9 rabbits treated with 5-FU by i.v. push at 12-18 mg/kg/d for 2 consecutive days. Measurements of serum lipid levels were performed before and 2 and 4 weeks after 5-FU administration. No obvious change of diet, body weight and bowel habits occurred during the study period. A significant reduction of total plasma cholesterol was observed in both patients and animals. The triglyceride levels were also reduced in the rabbits. Maximal cholesterol-lowering effect was observed in patients and rabbits with higher baseline cholesterol levels. The results suggest that 5-FU might interfere with lipid metabolism.

The intrafamilial clustering of hepatitis A virus infections (HAV) in families with an index case of sporadic hepatitis A was studied. Four hundred and three family members (84.3%) of 113 children with acute hepatitis A admitted to the Paediatric Department of the West Attica Hospital were included in the study. Epidemiological data and serum samples were collected within 1 week after the patient's admittance to the hospital. Enzyme-immunoassays were used to detect recent or past HAV infections. The attack rate of HAV infections in susceptible family members was found to be similar in susceptible fathers (16.6%, 1/6), mothers (23.5%, 4/17) and siblings (18.1%, 37/204). The infected family members belonged to 22 families. The attack rate was found to be higher in families with a lower immunity level, while the social class was not found to play an important role. The administration of ISG prevented further spread of hepatitis A among those susceptible. Our data suggest that immunoglobulin for HAV prevention should be given not only to children but also to parents and other adult family members in areas with a low prevalence of anti-HAV among adults.

The effect of spironolactone on renal magnesium excretion under both basal conditions and conditions of frusemide-induced diuresis was studied in 11 control subjects with normal hepatic and renal function and in 12 patients with liver cirrhosis and ascites. In the control group, oral administration of spironolactone (200 mg daily for 5 days) resulted in a significant decrease in the mean renal excretion of both magnesium and potassium. In the cirrhotic patients, spironolactone did not significantly change the mean renal excretion of magnesium or potassium, but it produced a significant reduction in the frusemide-induced increase in the renal excretion of both potassium and magnesium. The study suggests that spironolactone decreases magnesium excretion in normal subjects and antagonizes the magnesiuric effect of frusemide in patients with liver cirrhosis and secondary aldosteronism.

In order to improve educational programmes directed at health care workers we investigated their knowledge, attitudes and practices in relation to HIV/AIDS. An anonymous self-administered questionnaires was distributed to 609 health care workers. Of these, 59.6% agreed to participate (42.4% of the medical doctors, 74.3% of the nurses and 79.6% of the laboratory technicians, health visitors and other health care workers). All studied groups believed that their knowledge of HIV modes of transmission (84.3%) was sufficient. In contrast, a relatively small percentage reported knowledge of the clinical spectrum of HIV infection (48.8%) and the diagnostic assays (57.6%). Nearly all the study participants believe (92.8%) that there is a risk of acquiring HIV infection during the hospitalization of HIV/AIDS patients. Obligatory screening of all patients was reported by nearly all participants (90.6%) as a chance to minimize their occupational risk. Although health care workers reported satisfactory knowledge of safety measures (87.0%), only 56.7% used gloves and 38.8% accept the hospitalization of HIV/AIDS patients. In spite of the educational programmes for AIDS in Greece, this study demonstrates that health professionals' knowledge and precautionary measures are not sufficient. As a result, a small percentage of them treat AIDS patients without discrimination. There is an urgent need to implement specific educational programmes for health professionals so that they will safely provide high quality care to people affected by HIV/AIDS.

Non-Hodgkin lymphomas are a recognised complication of AIDS and may involve the oral cavity. However, no case of Hodgkin's disease affecting the oral cavity in AIDS appears to have been recorded. We report a male homosexual with AIDS and Hodgkin's lymphoma, who presented with gingival involvement.

The effects of different postcuring methods on the wear resistance of three different composite materials was evaluated using a clinically correlated in vitro test. While postcuring did not significantly affect the wear resistance of the occlusal contact surfaces in two of the materials tested, wear decreased significantly in the third material after heat postcuring. The effects of postcuring on wear resistance seem to be of a complex nature. Thus it is recommended not to use postcuring techniques indiscriminately.