Table 2 Univariable analyses comparing households with additional Giardia infection to those without
Risk factor / characteristic | Households with additional Giardia infection | Households without additional Giardia infection | Odds Ratio | 95% CI | P value | ||||
|---|---|---|---|---|---|---|---|---|---|
Total | Exposed | % | Total | Exposed | % | ||||
Children (<5) in household | 27 | 21 | 77.8 | 64 | 7 | 10.9 | 28.50 | [7.55–113.54] | 0.000 |
Less than 1 bedroom per person in household | 27 | 16 | 59.3 | 64 | 17 | 26.6 | 4.02 | [1.41–11.59] | 0.004 |
Assemblage B in the index case | 25 | 24 | 96.0 | 43 | 30 | 69.8 | 10.40 | [1.34–459.95] | 0.012 |
Children in nappies in household | 24 | 16 | 66.7 | 22 | 7 | 31.8 | 4.29 | [1.07–17.73] | 0.038 |
Less than 1 toilet per person in household | 27 | 23 | 85.2 | 64 | 41 | 64.1 | 3.23 | [0.93–14.24] | 0.049 |
Female index case | 27 | 15 | 55.6 | 64 | 21 | 32.8 | 2.56 | [0.92–7.13] | 0.060 |
Cat in household | 27 | 3 | 11.1 | 61 | 19 | 31.2 | 0.28 | [0.05–1.10] | 0.062 |
4 or more people in household | 27 | 18 | 66.7 | 64 | 28 | 43.8 | 2.57 | [0.92–7.48] | 0.066 |
Involved in changing nappies | 20 | 10 | 50.0 | 22 | 5 | 22.7 | 3.40 | [0.76–16.21] | 0.107 |
Assemblage A in the index case | 25 | 8 | 32.0 | 43 | 23 | 53.5 | 0.41 | [0.13–1.28] | 0.130 |
Vomiting in index case | 26 | 16 | 61.5 | 60 | 26 | 43.3 | 2.09 | [0.74–6.04] | 0.160 |
Index case under 5 years old | 27 | 6 | 22.2 | 64 | 6 | 9.4 | 2.76 | [0.65–11.48] | 0.171 |
Illness in household before index case | 27 | 6 | 22.2 | 59 | 6 | 10.2 | 2.52 | [0.59–10.53] | 0.181 |
Children that go to nursery in household | 24 | 13 | 54.2 | 21 | 7 | 33.3 | 2.36 | [0.61–9.53] | 0.231 |
Dog/cat in household | 27 | 12 | 44.4 | 64 | 38 | 59.4 | 0.55 | [0.20–1.49] | 0.250 |
Duration of illness greater than 7 days | 26 | 26 | 100.0 | 57 | 53 | 93.0 | . | [0.48-.] | 0.304 |
Previous Giardia in index case | 27 | 0 | 0.0 | 60 | 4 | 6.7 | 0.00 | [0.00–2.10] | 0.306 |
Index case travelled abroad before onset | 27 | 7 | 25.9 | 61 | 22 | 36.1 | 0.62 | [0.19–1.85] | 0.462 |
Dog in household | 27 | 12 | 44.4 | 62 | 23 | 37.1 | 1.36 | [0.49–3.73] | 0.638 |
Dog in household under 2 years | 18 | 1 | 5.6 | 41 | 5 | 12.2 | 0.42 | [0.01–4.28] | 0.656 |
Index case contact with other illness | 26 | 3 | 11.5 | 56 | 4 | 7.1 | 1.70 | [0.23–10.85] | 0.673 |
Assemblage AB in the index case | 25 | 7 | 28.0 | 43 | 10 | 23.3 | 1.28 | [0.35–4.50] | 0.773 |
Any pet in household | 27 | 16 | 59.3 | 61 | 34 | 55.7 | 1.16 | [0.42–3.24] | 0.818 |
White British index case | 27 | 24 | 88.9 | 64 | 57 | 89.1 | 0.98 | [0.20–6.38] | 1.000 |
Dog or cat in household under 2 years | 20 | 2 | 10.0 | 48 | 7 | 14.6 | 0.65 | [0.06–3.92] | 1.000 |
Index case resident in rural location | 27 | 3 | 11.1 | 64 | 6 | 9.4 | 1.21 | [0.18–6.22] | 1.000 |
Diarrhoea in index case | 26 | 25 | 96.2 | 63 | 61 | 96.8 | 0.82 | [0.04–50.26] | 1.000 |
Cat in household under 2 years | 13 | 1 | 7.7 | 35 | 2 | 5.7 | 1.38 | [0.02–28.53] | 1.000 |
Household is a farm | 26 | 0 | 0.0 | 58 | 1 | 1.7 | 0.00 | [0.00-.] | 1.000 |
Household has a garden | 26 | 19 | 73.1 | 59 | 42 | 71.2 | 1.10 | [0.36–3.67] | 1.000 |