| Frequency | 95% confidence intervals |
---|---|---|
Correct use | 35.0 | 26.4–44.7 |
Incorrect use | ||
 Beneath mattress | 42.0 | 32.8–51.8 |
 Holes | 41.0 | 32.5–51.3 |
 Net age | 22.8a | 14.9–33.2 |
 Above bed | 4.0 | 1.6–9.8 |
 Alteration | 3.0 | 1.0–8.5 |
 Storage | 2.0 | 0.6–7.0 |
 Size | 1.0 | 0.2–5.4 |