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Table 4 Integrity of campaign nets present in households

From: Monitoring the durability of the long-lasting insecticidal nets Olyset® and PermaNet® 2.0 in similar use environments in Zanzibar

Variable

Baseline

% (95% CI)

12 months

% (95% CI)

24 months

% (95% CI)

36 months

% (95% CI)

Unguja

N = 382

N = 305

N = 225

N = 195

Mean months since campaign

3.6

12.4

23.6

32.7

Net has any hole

9.9 (6.5–15.0)

48.5 (40.1–57.1)

78.2 (67.7–86.0)

89.7 (78.4–95.5)

Physical condition (pHI)

 Good (0–64)

96.3 (91.8–98.4)

78.4 (69.4–85.3)

50.2 (39.3–61.1)

33.3 (22.6–46.1)

 Damaged (65–642)

2.9 (1.2–6.5)

16.7 (11.0–24.5)

34.7 (28.0–42.1)

34.4 (25.3–44.7)

 Torn (> 642)

0.8 (0.2–3.6)

4.9 (2.5–9.5)

15.1 (9.7–22.9)

32.3 (22.7–43.7)

 Serviceable (0–642)

99.2 (96.4–99.8)

95.1 (90.5–97.5)

84.9 (77.2–90.3)

67.7 (56.3–77.3)

Median pHI if any hole (IQR)

25 (2–200)

48 (23–233)

191 (30–520)

269 (59–1032)

Has any repairs if any hole

n/a

18.9 (11.3–30.0)

37.5 (29.0–46.9)

46.3 (35.8–57.1)

Pemba

N = 452

N = 352

N = 277

N = 250

Mean months since campaign

3.9

12.7

23.4

32.5

Net has any hole

7.3 (5.0–10.6)

54.8 (44.4–64.8)

75.8 (65.5–83.8)

88.8 (82.6–93.0)

Physical condition (pHI)

 Good (0–64)

96.5 (94.0–97.9)

74.7 (65.5–82.2)

49.1 (38.6–59.6)

34.8 (26.3–44.4)

 Damaged (65–642)

2.7 (1.5–4.7)

17.1 (12.9–22.2)

28.5 (22.9–34.9)

29.2 (23.0–36.2)

 Torn (> 642)

0.9 (0.3–2.3)

8.2 (4.6–14.4)

22.4 (16.7–29.4)

36.0 (29.5–43.0)

 Serviceable (0–642)

99.1 (97.7–99.7)

91.8 (85.6–95.4)

77.6 (70.7–83.3)

64.0 (57.0–70.5)

Median pHI if any hole (IQR)

55 (4–248)

50 (6–343)

181 (29–772)

324 (57–1241)

Has any repairs if any hole

n/a

12.4 (6.0–24.0)

31.0 (19.8–44.9)

41.0 (30.6–52.3)