Table 4 Multivariate adjusted incidence rate ratios for skin infections using a negative binomial model adjusted for clustering of children in dwellings.
| Â | Model 1 | Model 2 | Model 3 | Model 4 |
|---|---|---|---|---|
| Â | IRR (95% CI) | IRR (95% CI) | IRR (95% CI) | IRR (95% CI) |
Main effects | Â | Â | Â | Â |
Facilities for removing human faeces not functioning | 1.28 (0.88–1.85) | na | na | 2.03 (1.34–3.06) |
Combined HLPs | na | 1.37 (0.92–2.03) | na | na |
Dwelling built pre 19801,2,3 | 0.76 (0.36–1.61) | 0.64 (0.32–1.30) | 1.16 (0.51–2.60) | na |
Concrete/other floor material1 | 2.27 (0.67–7.67) | a | a | na |
Household cleaning equipment missing3 | a | a | 1.82 (1.18–2.81) | a |
Internal contaminants present | a | a | a | 0.67 (0.45–1.00) |
External contaminants present | a | a | a | 2.27 (1.28–4.03) |
Child age | Â | Â | Â | Â |
Less than 3 years1,2,3 | 1.57 (1.06–2.33) | 1.46 (0.98–2.18) | 1.54 (1.04–2.29) | 1.63 (1.17–2.28) |
3 to less than 7 years | 1.00 | 1.00 | 1.00 | 1.00 |
Carer age | Â | Â | Â | Â |
Less than 20 years | 2.29 (1.60–3.26) | 2.36 (1.54–3.63) | 2.19 (1.45–3.29) | a |
20 to 34 years | 1.00 | 1.00 | 1.00 | a |
35 years or more | 2.41 (1.57–3.71) | 2.30 (1.56–3.39) | 2.38 (1.64–3.44) | a |
Three carers in dwelling4 | a | a | a | 0.63 (0.21–1.90) |
4 or more children under 7 years | 2.55 (1.70–3.81) | 1.95 (1.26–3.02) | 1.89 (1.23–2.92) | a |
Child mobile | 1.39 (0.88–2.20) | 1.46 (0.90–2.36) | 1.57 (0.98–2.50) | a |
Residence per bedroom | Â | Â | Â | Â |
   Lowest (≤ 2 per bedroom) | 1.00 | 1.00 | 1.00 | a |
   Middle (2 to ≤ 4 per bedroom)1 | 2.22 (0.89–5.52) | 1.35 (0.72–2.52) | 1.25 (0.70–2.26) | a |
   Highest (4 to 8.33 per bedroom)1 | 1.61 (0.61–4.21) | 1.81 (0.90–3.63) | 1.54 (0.81–2.93) | a |
Carers education | Â | Â | Â | Â |
   Grade 11 and 12 | a | a | a | 1.00 |
   Grade 9 and 10 | a | a | a | 0.92 (0.53–1.61) |
   Grade 8 and below | a | a | a | 1.70 (1.02–2.84) |
Low family income (≤ $935) | 2.21 (1.53–3.20) | 1.84 (1.25–2.69) | 1.78 (1.24–2.57) | 1.62 (1.10–2.37) |
Carer unemployed4 | 0.73 (0.52–1.03) | a | a | 0.53 (0.35–0.82) |
Interactions | Â | Â | Â | Â |
Child less than 3 years × dwelling built pre-1980 | 3.04 (1.52–6.08) | 3.63 (1.74–7.57) | 4.14 (1.95–8.80) | na |
Cleaning equipment missing × dwelling built pre-1980 | a | a | 0.36 (0.17–0.74) | na |
Concrete/other floor material × middle level crowding | 0.35 (0.09–1.30) | a | a | na |
Concrete/other floor material × highest level crowding | 1.11 (0.29–4.26) | a | a | na |
Carer unemployed × three or more carer's in dwelling | a | a | a | 6.19 (1.93–19.84) |
Log pseudo-likelihood | -196.298 | -201.777 | -199.553 | -203.606 |
Model: Pseudo R 2 | 15.1% | 12.7% | 12.7% | 11.9% |