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Table 6 Multivariable regression analysis of factors predictive for scoring above the 75th percentile on the OKAPS
| Variable | Odds Ratio | 95% Confidence interval | P-value |
|---|---|---|---|
| Sex (reference female) | |||
| Male | 2.14 | 0.94–4.90 | 0.070 |
| Region (reference Midwest) | |||
| Northeast | 3.49 | 0.97–12.56 | 0.056 |
| West | 3.67 | 0.99–13.50 | 0.051 |
| South | 2.90 | 0.74–11.45 | 0.128 |
| Lectures (reference did not use) | |||
| Not very useful | 0.60 | 0.10–3.61 | 0.578 |
| Extremely/moderately useful | 1.42 | 0.13–4.85 | 0.795 |
| Group study (reference did not use) | |||
| Not very useful | 3.40 | 1.16–9.94 | 0.026 |
| Extremely/moderately useful | 0.67 | 0.53–3.78 | 0.481 |
| Incentives (reference no) | |||
| Yes | 2.75 | 1.16–6.56 | 0.022 |
| Average number of hours per week spent studying | 1.09 | 1.01–1.17 | 0.026 |
| Average number of hours spent in research 3 months prior to exam | 0.93 | 0.87–0.99 | 0.020 |
| Step 1 | 2.48 | 1.68–3.64 | < 0.001 |
