data base based OR (95% CI) | survey based OR (95% CI) | |
---|---|---|
number of applicable abstracts | 836 | 494 |
abstracts with missing values | 0 | 71 |
total in analysis | 836 | 423 |
statistical significance | ||
positive | 1 | 1 |
negative | 0.8(0.6–1.2) | 0.7(0.4–1.2) |
equivocal | 0.7(0.6–1.0) | 0.4 (0.2–0.7) |
previous publications of PI | ||
less than 10 | not available | 1 |
more than 10 | 1.7(1.1–2.8) | |
multi-center status | ||
1–3 centers | 1 | 1 |
> 3 centers | 2.8(1.6–4.9) | 2.0 (0.9–4.5) |