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Probability of Finding Institutional Web Sites in the First 10 Positions According to Topic and Search Engine
| OR | 95%CI | |
|---|---|---|
| Topic | ||
| Nuclear power | Reference | |
| Electromagnetic waves | 1.0 | 0.6–1.8 |
| Waste | 1.8 | 1.1–3.0 |
| Air pollution | 2.9 | 1.8–4.7 |
| Radon | 3.4 | 2.1–5.4 |
| Search engine | ||
| Bing | Reference | |
| Yahoo | 2.1 | 1.3–3.6 |
| Ask | 2.2 | 1.3–3.8 |
| AOL | 2.5 | 1.5–4.2 |
| 3.1 | 1.9–5.1 | |
CI, confidence interval; OR, odds ratio.
