A defined general population of 159,200 male and female native Swedes born in the period of 1911–1940, from an urban catchment area of the then only general hospital, was followed over a decade (1970–1979) with regard to inpatient hospitalization for all kinds of diagnoses. Psoriasis cases (n = 372) are significantly (p < 0.001) associated with a spectrum of diseases: male as well as female psoriatics seem to show excess rates of viral infections, alcoholism, hypertension, pneumonia, liver cirrhosis, urticaria, and rheumatoid arthritis. Psoriasis in males only seem to be associated with iritis and ankylosing spondylitis, whereas psoriasis in females only is associated with lung cancer, diabetes, obesity, myocardial infarction and asthma.
A hypothesis of selective predisposition for drepression, neurasthenic syndrome and anxiety states has been tested in a prospective study. The primary material for the investigation consisted of 4,000 city inhabitants who had registered a private car. Almost all of these could be invited to a group investigation by questionnaire in the autumn of 1959. Out of those invited, 83% participated, and out of these, 3,019 were males (the secondary material). Six years later, the registers of public psychiatric out- and in-patient units in the city were examined as to the appearance in 1960 or later of the men in the secondary material. One hundred and fourteen of these men were found in the registers. For each of these men ten controls, matched for age, were chosen from the rest of the secondary material. Thirty-seven of the patients had had a depression and 17 a neurasthenic syndrome as the main diagnosis, and 17 had an anxiety state as the main or secondary diagnosis. As independent factors were chosen the Sjöbring personality factors sub-validity (psychasthenic traits), sub-stability (syntonia) and sub-solidity (hysteroid habitual attitude), as well as subclinical phenomena related to the neurasthenic, depressive and anxiety syndromes. It was not possible to show a specific predisposing power of the background factors investigated. Psychasthenic premorbid personality, however, was significantly related to depression, and also showed a strong tendency to an association with neurasthenic syndrome and anxiety states.
Data from the Swedish personal number system were used to examine rates of admissions to hospital, particularly with myocardial infarction, stroke, diabetes mellitus, or hypertension, in relation to marital state and histories of admission with alcoholism in 77843 men from Gothenburg born in 1911-40. The number of admissions to hospital with the four diseases varied with marital state and history of admission with alcoholism, but by considering each subset from the total group it was possible to show that among alcoholic men no material variation in the number of admissions was evident. By contrast, among the nonalcoholic men those who were married were particularly prone to myocardial infarction but less likely to be admitted with stroke or diabetes mellitus than the unmarried or divorced men.The data show the value of common personal and health statistical numbering systems in generating epidemiological information beyond that obtainable from aggregated data without a record linkage technique.
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