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[Primary-care morbidity and true morbidity due to acute respiratory infections].

The present work presents the study of morbidity due to acute respiratory infections (ARI) in areas of the town of Lisa in Ciudad Habana, and Isla Juventud (Cuba), to characterize different aspects of morbidity measured by health care attendance and to measure true morbidity. About 90% of consultations for ARI were first-time consultations, while their ratio to further consultations was 5.3. True morbidity rates (TMR), obtained trough active research, ranged from 110.4 to 163.4 cases per 1000 inhabitants, considerably higher than morbidity rates measured by primary care consultations (MRPCC) in the same time period. The true morbidity index (TMI), as measured by the ratio of the two previous rates, ranged from 5 to 15. A high proportion (47.6%) of cases reported no medical care attendance. These results provide approximate estimates of true morbidity in the study area, and allow the establishment of a new control program, also improving epidemiologic surveillance within primary care activities.

Acute Disease

The febrile morbidity score as a predictor of febrile morbidity following cesarean section.

The study comprised 150 women delivered by cesarean section. Each patient was given a score of 0, 1 or 2 for each of the following risk factors; parity, body weight, hemoglobin level, duration of labor and duration of rupture of membranes. No antibiotics were given before, during or after the operation. Postoperatively, the cases were observed for the occurrence of febrile morbidity. It was found that out of the 150 cases, 60 (40%) developed febrile morbidity. The minimal threshold score of these patients was found to be 5. No case in the afebrile group (90 cases) had this score. Also, the mean febrile morbidity score (FMS) of the morbid cases was 6.37 +/- 0.87 compared with 3.16 +/- 0.78 among the nonmorbid cases (P less than 0.001). The febrile morbidity score is valuable in predicting the occurrence of febrile morbidity following cesarean section.

Body Weight

Pharmaco-morbidity linkage: a feasibility study comparing morbidity in two pharmacy based exposure cohorts.

STUDY OBJECTIVES: The aims were (1) to compare discharge diagnoses and concurrent medication in a pharmacy based cohort of users of H2 receptor antagonists to those in a population of users of other drugs in the same period, who did not use H2 receptor antagonists; (2) to compare these results to those of a similar study performed with the Tayside record linkage scheme. DESIGN AND SETTING: The study was a retrospective cohort study. The morbidity data from the only hospital in one medium sized city (62,000 inhabitants) were linked to the dispensing data of all five community pharmacies on an individual basis (April 1, 1986-December 31, 1989). In the absence of a unique patient identification number, data from pharmacies and hospital were linked by the combination of date of birth, gender, and general practitioner code. For every user of H2 receptor antagonists two controls were obtained from all patients who had not used these drugs, and matched for age (within 5 years), gender, and general practitioner. All discharge diagnoses which followed this first prescription up to December 31, 1989, in a patient in the index cohort, and during the same period in his or her matched controls, were included in the study. MAIN RESULTS: In the index cohort (n = 2174) 341 persons were admitted (526 admissions) as against 398 persons (527 admissions) in the control cohort (n = 4348). There was increased morbidity in the index cohort, especially concerning the gastrointestinal system (peptic ulcers and malignancies, abdominal pain, gastrointestinal haemorrhage), but also concerning the musculoskeletal, respiratory, and circulatory systems. The morbidity in the last three groups corresponded with drugs used concomitantly by patients in the index cohort, so it was probably not causally related to the intake of H2 receptor antagonists but was rather an indicator of higher levels of morbidity in the index cohort. CONCLUSIONS: The figures were grossly comparable to those of the Tayside record linkage scheme. Probabilistic linking with the patient characteristics of gender, date of birth, and general practitioner code can facilitate the undertaking of postmarketing surveillance studies.

Chronic Disease

The Hawaii EMS-C project data: I. Reducing pediatric emergency morbidity and mortality; II. Statewide pediatric emergency registry to monitor morbidity and morality.

During a 12-month period ending on 11/30/88, data were collected on 16,010 pediatric patients who visited a pediatric emergency department (ED). These ED patients prospectively fell into one of the target areas for further study, including wheezing (15%), trauma (excluding burns; 29%), burns (1%), water-related injuries (1%), ingestions and toxic substance exposures (2%), child abuse (3%), handicapping conditions (5%), preventable incidents (33%), and ambulance arrivals (7%). Handicapped patients were more likely to require an ambulance. Younger patients, males, and patients with handicaps, wheezing, and Medicaid insurance were more likely to visit the ED on multiple occasions. Primary care physicians could be identified in 77% of the cohort. Large-scale interventions to reduce preventable pediatric morbidity and mortality have suffered from difficulties in documenting their effect in a population-based sample. A statewide pediatric emergency encounter registry is proposed.

Adolescent

The compression of morbidity hypothesis: promise and pitfalls of using record-linked data bases to assess secular trends in morbidity and mortality.

Individuals who are 65 years of age and older have exhibited unprecedented declines in mortality over the past few decades in the United States. Whether this increased survival has been accompanied by delays in the onset of disease or greater age-specific morbidity remains unanswered because of a paucity of reliable information on secular trends in age-specific disease incidence and survival. The Rochester Epidemiology Project (REP) is one of a few existing medical record linkage systems that offer promise of providing some of the necessary information. Several examples are presented that illustrate the potential of medical record-linked data bases for examining secular trends in the association between age at onset of disease and age at death.

Age Factors

Studies of respiratory morbidity in rubber workers. Part IV. Respiratory morbidity in talc workers.

Pulmonary function tests, chest x-rays, and respiratory questionnaires were administered to eighty talc workers and 189 non-exposed rubber workers from three rubber tire manufacturing plants. The talc workers, who were exposed to talc at levels below the current threshold limit value (TLV) of 20 mppcf for nonfibrous talc, had a statistically significantly greater prevalence of productive cough and of positive criteria for chronic obstructive lung disease (COLD) than did the control workers. The talc workers with more than 10 years of exposure had significantly decreased residual FEV 1.0. Multiple regression analysis of FEV 1.0 in the talc workers estimated that each year of exposure to talc dust reduced the FEV 1.0 by 26 ml. Talc workers had a clear increase in respiratory morbidity, despite the absence of chest roentgenographic changes. Based on this study, a safe exposure level for talc appears to be 25 mg/m3 as a time-weighted average.

Bronchitis

Studies of respiratory morbidity in rubber workers. Part III. Respiratory morbidity in processing workers.

Respiratory questionnaires and pulmonary function tests were administered to sixty-five men exposed to dust in the processing are from three rubber tire manufacturing plants. Similar tests were done on 189 "control" workers. Compared with the controls, the processing workers had a higher prevalence of chronic productive cough. Overall, the processing group showed a decrease in the ratio of FEV to FVC. The processing workers with more than ten years of exposure showed a significant decrease in the ratio of FEV1.0/FVC, the FEV1.0, the residual FEV1.0, and the flow rates at 50% and 25% of the forced vital capacity. None of the pulmonary function effects could be solely explained on the basis of smoking, age, ethnic, or socioeconomic factors: all were related to the length of exposure. Based on these results we conclude that exposure in the processing area produces pulmonary disease.

Adult