Table 3.
Number of holes in each of four different size categories in long-lasting insecticidal nets (LLINs) over the 3 years of follow-up, by brand*
| Follow-up time, by brand | Hole size category | Olyset | PermaNet 2.0 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Sum of holes | Median no. holes per LLIN | Mean no. holes per LLIN | 95% Confidence limits | Sum of holes | Median no. holes per LLIN | Mean no. holes per LLIN | 95% Confidence limits | ||
| 1 year Olyset N = 50 PermaNet 2.0 N = 73 | ≤ 2 cm | 841 | 11.5 | 16.8 | 12.0–21.6 | 748 | 5 | 10.2 | 7.2–13.3 |
| > 2 and ≤ 10 cm | 472 | 5 | 9.4 | 6.6–12.3 | 176 | 1 | 2.4 | 1.6–3.2 | |
| > 10 and ≤ 25 cm | 80 | 1 | 1.6 | 0.9–2.3 | 26 | 0 | 0.4 | 0.2–0.5 | |
| > 25 cm | 24 | 0 | 0.5 | 0.1–0.8 | 12 | 0 | 0.2 | 0.0–0.3 | |
| 2 years Olyset N = 56 PermaNet 2.0 N = 97 | ≤ 2 cm | 2,282 | 30 | 40.8 | 32.8–48.7 | 2418 | 13 | 24.9 | 19.0–30.9 |
| > 2 and ≤ 10 cm | 1,251 | 15 | 22.3 | 15.9–28.8 | 811 | 5 | 8.4 | 6.3–10.5 | |
| > 10 ≤ 25 cm | 177 | 2 | 3.2 | 2.3–4.0 | 86 | 0 | 0.9 | 0.5–1.3 | |
| > 25 cm | 66 | 0.5 | 1.2 | 0.7–1.6 | 28 | 0 | 0.3 | 0.1–0.5 | |
| 3 years Olyset N = 47 PermaNet 2.0 N = 86 | ≤ 2 cm | 2,203 | 41 | 46.8 | 38.3–55.4 | 2,489 | 23 | 28.9 | 23.7–34.1 |
| > 2 and ≤ 10 cm | 1,505 | 24 | 32.0 | 25.3–38.8 | 1,047 | 7 | 12.2 | 9.3–15.0 | |
| > 10 and ≤ 25 cm | 273 | 3 | 5.8 | 3.8–7.8 | 131 | 1 | 1.5 | 1.1–2.0 | |
| > 25 cm | 139 | 2 | 3.0 | 1.8–4.1 | 35 | 0 | 0.4 | 0.2–0.6 | |
*
Analysis excludes three outlier nets: 2 Olyset LLINs from year 2 with 1,161 and 2,607 holes, and 1 PermaNet 2.0 LLIN from year 3 with 3,403 holes for a total of 412 LLINs.