Birth Order and Family Size: Bias Caused by Changes in Birth Rate
| Autor: | E H Hare, J S Price |
|---|---|
| Rok vydání: | 1969 |
| Předmět: |
Adult
Male Adolescent Statistics as Topic Population Sibling relations Biology Sampling Studies Birth rate 03 medical and health sciences 0302 clinical medicine London Humans Sibling Relations 030212 general & internal medicine Birth Rate education Aged Family Characteristics education.field_of_study Wales Mental Disorders Family characteristics Middle Aged 030227 psychiatry Psychiatry and Mental health Birth order England Population Surveillance Female Birth Order Birth cohort Demography |
| Zdroj: | British Journal of Psychiatry. 115:647-657 |
| ISSN: | 1472-1465 0007-1250 |
| DOI: | 10.1192/bjp.115.523.647 |
| Popis: | 1. Birth order and sibship size were studied in a series of over 20,000 psychiatric patients. Schizophrenic patients were excluded from the series because their birth order distribution did not follow the same pattern as other diagnostic groups. It is argued that the series may, with certain limitations, be accepted as a representative sample of the general population. 2. The distribution of birth ranks deviated very significantly from random, there being an over-representation of early ranks in sibships of two and three, and an over-representation of late ranks in sibships of five and larger. The extent of the deviation varied with the year of birth of the patients. 3. The type of deviation was in accord with theoretical prediction and its fluctuations were shown to follow changes in the number of marriages and of births in the population of England and Wales. 4. It is argued that in studies of the relation between illness and birth order in adults (where bias due to incomplete sibships is minimal or absent) it is necessary to take into account the bias due to reproductive changes in the population. 5. Figures are presented of the changing distribution of sibship size in the population, by birth cohorts. 6. In sibships of four there was an excess of males in the last, and of females in the penultimate, birth rank. |
| Databáze: | OpenAIRE |
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