The interactive effects of induced abortion, inter-pregnancy interval and contraceptive use on subsequent pregnancy outcome
| Autor: | Richard H. Shachtman, John R. Schoenfelder, Wilbert M. Gesler, Carol J. R. Hogue |
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| Rok vydání: | 1978 |
| Předmět: |
Adult
medicine.medical_specialty Time Factors Adolescent Epidemiology Abortion Pregnancy Medicine Humans Gynecology business.industry Obstetrics Confounding Infant Newborn Abortion Induced Infant Low Birth Weight medicine.disease Outcome (probability) Abortion Spontaneous Low birth weight Parity Contraceptive use Contraception Life table Interval (graph theory) Female medicine.symptom business |
| Zdroj: | American journal of epidemiology. 107(1) |
| ISSN: | 0002-9262 |
| Popis: | Prior induced abortion and outcome of the next pregnancy are investigated, allowing for two intervening and potentially confounding variables: 1) length of interval between the termination of the first pregnancy and the conception of the next (inter-pregnancy interval) and 2) the utilization of contraception during this interval. Results show that non-contracepting (susceptibility) intervals which immediately precede a subsequent pregnancy are significantly shorter following an induced abortion than those following a spontaneous abortion or delivery. A life table analysis of all susceptibility intervals confirmed this finding. To investigate outcome of subsequent pregnancy as influenced by preceding pregnancy outcome, inter-pregnancy interval and contraceptive use in the interval, a categorical linear model has been developed. Among non-contraceptors, the model indicates no differences in proportions of succeeding adverse outcomes (spontaneous abortion or low birth weight) regardless of inter-pregnancy interval and whether or not the preceding pregnancy had been terminated by an induced abortion. For the contraceptive users, however, proportions of adverse outcomes increased with length of inter-pregnancy interval, and, within each interval category, proportion of adverse outcomes was higher when the preceding pregnancy had terminated in an induced abortion. |
| Databáze: | OpenAIRE |
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