Table 6 Determinants of physical durability (risk of failure to survive in serviceable condition) from Cox proportional hazard models
Variable | Adjusted hazard ratio (HR) | 95% CI | p-value |
|---|---|---|---|
At household level; N = 2722 obs/890 nets | |||
Site/Brand of LLIN | |||
Unguja (PermaNet 2.0) | 1.00 | ||
Pemba (Olyset) | 2.34 | 1.78–3.08 | < 0.0001 |
Net care attitude of household across surveys | |||
Had a very positive score (> 1.0) never or only once | 1.00 | ||
Had very positive score (> 1.0) at least twice | 0.71 | 0.53–0.97 | 0.031 |
Number of children under 10 years in household | |||
None | 1.00 | ||
1–2 | 2.00 | 1.10–3.65 | 0.023 |
3 or more | 3.15 | 1.83–5.42 | < 0.0001 |
Educational status of head of household | |||
Non-literate or primary | 1.00 | ||
Secondary or higher | 0.65 | 0.51–0.82 | < 0.0001 |
At net level (nets ever hung) N = 2244 obs/697 nets | |||
Site/Brand of LLIN | |||
Unguja (PermaNet 2.0) | 1.00 | ||
Pemba (Olyset) | 2.54 | 1.85–3.48 | < 0.0001 |
Net care attitude of household across surveys | |||
Had a very positive score (> 1.0) never or only once | 1.00 | ||
Had very positive score (> 1.0) at least twice | 0.62 | 0.43–0.88 | 0.007 |
Number of children under 10 years in household | |||
None | 1.00 | ||
1–2 | 1.60 | 0.84–3.02 | 0.15 |
3 or more | 2.12 | 1.19–3.81 | 0.011 |
Educational status of head of household | |||
Non-literate or primary | 1.00 | ||
Secondary or higher | 0.71 | 0.54–0.92 | 0.011 |
Folding up of hanging nets during day | |||
Always or at least sometimes | 1.00 | ||
Never | 1.77 | 1.29–2.43 | < 0.001 |
Users of net | |||
Children alone or with adults | 1.00 | ||
Adults only | 0.73 | 0.56–0.97 | 0.031 |
Type of sleeping place | |||
Finished bedframe, mattress or mat | 1.00 | ||
Unfinished bedframe | 0.72 | 0.56–0.93 | 0.013 |