Table 2 Adjusted odds ratio (OR) of AOM episodes suspected by primary caregivers
Logistic Regression Model | ||
Factor | Adjusted OR (95% CI) | |
By trial site | Non-trial sites | Reference |
Trial sitea | 1.08 (0.39, 3.02) | |
By type of sites | Public | Reference |
Private | 1.08 (0.25, 4.74) | |
By age (Years) of caregiver | 18-24 | Reference |
25-39 | 0.77 (0.25, 2.38) | |
≥40 | 2.05 (0.22, 18.76) | |
By relationship of caregiver to child | Mother or father | Reference |
Other relativesb | 0.20 (0.03, 1.41) | |
By age of child when episode occurred | Less than 6 months | Reference |
6 to less than 12 months | 1.14 (0.26, 5.01) | |
12 to less than 18 months | 2.19 (0.42, 11.30) | |
18 to less than 24 months | 4.48 (0.46, 43.68) | |
24 to less than 30 months | 3.23 (0.25, 41.24) | |
By day care attendance | Yes | Reference |
No | 0.92 (0.09, 9.58) | |
By number of other children in household: <5 years oldc | 0 | Reference |
1 | 0.76 (0.25, 2.33) | |
2 | 1.80 (0.46, 7.06) | |
3 or more | 2.67 (0.20, 36.51) | |
By number of children in household: 5–18 years old | 0 | Reference |
1 | 2.41 (0.60, 9.61) | |
2 | 0.67 (0.19, 2.39) | |
3 or more | 1.49 (0.27, 8.10) | |
By overall income (US dollars) | Less than 400 | Reference |
400 to 999 | 5.63 (1.44, 22.01) | |
1000 to 1999 | 1.20 (0.28, 5.17) | |
Unknown or prefer not to answer | 2.78 (0.58, 13.33) | |
By perceived severity of illness | Mild illness | Reference |
Moderate or severe illness | 5.53 (1.98, 15.49) | |
By length of time since episode (months) | Less than one month ago | Reference |
Between one and three months ago | 0.76 (0.26, 2.19) | |
Between three and six months ago | 6.56 (1.25, 34.40) | |
By highest educational level | Less than University | Reference |
University | 0.96 (0.27, 3.46) | |
By occupational status | Not-employedd | Reference |
Employed | 3.26 (0.91, 11.67) | |
Logistic Regression Model with Backward Selection (at 0.05 significance level) | ||
Factor | Adjusted OR (95% CI) | |
By overall income (US dollars) | Less than 400 | Reference |
400 to 999 | 4.71 (1.36, 16.37) | |
1000 to 1999 | 1.24 (0.38, 4.02) | |
Unknown or prefer not to answer | 3.46 (0.966, 12.56) | |
By occupational status | Not-employed | Reference |
Employed | 3.27 (1.08, 9.91) | |
By perceived severity of illness | Mildly ill | Reference |
Moderately or severely ill | 4.61 (1.83, 11.61) | |
Length of time since episode (months) | Less than one month ago | Reference |
Between one and three months ago | 0.70 (0.28, 1.72) | |
Between three and six months ago | 5.93 (1.24, 28.37) | |