| Urban | Rural | ||
---|---|---|---|---|
OR (95% CI) | P value | OR (95% CI) | P value | |
Education (ref: primary school or below) | Â | Â | Â | Â |
 Middle school | 1.64 (0.83–3.25) | 0.16 | 1.65 (0.89–3.08) | 0.11 |
 High school or above | 0.63 (0.24–1.64) | 0.34 | 0.44 (0.21–0.91) | 0.027* |
Expenditure quintiles (ref: 1) | Â | Â | Â | Â |
 2 (Poorer) | 0.74 (0.31–1.73) | 0.48 | 0.90 (0.44–1.83) | 0.77 |
 3 (Middle) | 1.20 (0.50–2.88) | 0.69 | 1.13 (0.53–2.38) | 0.76 |
 4 (Rich) | 0.46 (0.19–1.15) | 0.10 | 0.92 (0.45–1.89) | 0.83 |
 5 (Richest) | 0.47 (0.19–1.15) | 0.10 | 1.01 (0.50–2.04) | 0.99 |