Factors influencing the timing of first sexual intercourse among young people in Nyanza, Kenya.
Bibliographic record
Abstract
CONTEXT: Despite the relevance of the timing of first intercourse for the risk of HIV infection, few studies have examined postponement of first sex as a strategy to prevent infection. METHODS: Survey data collected in October 2003 from 8,183 standard six and standard seven students aged 11-17 in 160 schools in Nyanza Province, Kenya, were used in logit and log-normal hazard models to understand the factors that influence the timing of first sexual intercourse. RESULTS: Both males and females who rejected myths about HIV transmission, those who experienced less sexual pressure and those who did not know anyone who had died of AIDS, as well as males who had a stronger belief in their ability to abstain, were more likely to postpone sexual intercourse than were young people who lacked those characteristics. Although lower levels of perceived HIV risk were associated with early sexual initiation, adolescents who felt they were at no risk of HIV infection were most likely to postpone initiation. The pattern of associations across gender suggests that males are pressured into very early sexual activity to prove their maturity, although males who had confidence that they could abstain were more likely to do so. Females, however, were not able to translate belief in their ability to abstain into abstinence and were influenced to engage in intercourse by social and environmental pressures. CONCLUSIONS: To support delays in sexual initiation, HIV prevention programming and policy need to be focused on dispelling myths about HIV transmission and countering the gendered pressures that young people feel to initiate sexual activity during their early adolescence.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".