| Any repellent | Vaporizer | Coil | |||
---|---|---|---|---|---|---|
 | Risk ratio (95 % CI) | P | Risk ratio (95 % CI) | P | Risk ratio (95 % CI) | P |
Chennai Survey | ||||||
 At least Secondary education | 1.28 (1.09–1.50) | 0.002 | ns |  | ns |  |
 Socio-economic status | ||||||
  High | ns |  | 1.62 (0.90–2.91) | 0.106 | 0.12 (0.04–0.40) | 0.001 |
  2 |  |  | 1.79 (1.04–3.09) | 0.036 | 0.59 (0.30–1.16) | 0.126 |
  3 |  |  | 1.81 (1.05–3.13) | 0.034 | 0.58 (0.30–1.13) | 0.110 |
  4 |  |  | 1.75 (1.02–3.02) | 0.043 | 0.92 (0.52–1.64) | 0.775 |
  Low |  |  | Reference |  | Reference |  |
Nadiad Survey | ||||||
 Socio-economic status | ||||||
  High | 4.45 (2.90–6.82) | < 0.001 | 15.83 (5.68–44.13) | < 0.001 | 4.18 (2.13–8.21) | < 0.001 |
  2 | 4.30 (2.82–6.56) | < 0.001 | 20.00 (7.43–53.87) | < 0.001 | 3.73 (1.87–7.43) | < 0.001 |
  3 | 3.13 (1.93–5.08) | < 0.001 | 6.75 (1.97–23.20) | 0.002 | 3.80 (1.91–7.56) | < 0.001 |
  4 | 1.33 (0.76–2.34) | 0.315 | 3.22 (1.03–10.00) | 0.044 | 1.90 (0.91–3.96) | 0.087 |
  Low | Reference |  | Reference |  | Reference |  |
Raurkela Survey | ||||||
 At least secondary education | ns |  | 0.40, 0.20–0.81 | 0.010 | 2.08, 0.96–4.51 | 0.064 |
 Socio-economic status | ||||||
  High | 2.41 (1.46–3.97) | 0.001 | ns |  | 21.95 (8.12–59.32) | < 0.001 |
  2 | 1.03 (0.45–2.37) | 0.945 |  |  | 5.18 (1.40–19.16) | 0.014 |
  3 | 0.83 (0.58–1.19) | 0.316 |  |  | 1.61 (0.59–4.37) | 0.348 |
  4 | 0.79 (0.61–1.03) | 0.087 |  |  | 0.95 (0.38–2.40) | 0.915 |
  Low | Reference |  | Reference |  | Reference |  |
 Rainy season | ns |  | ns |  | 3.27 (1.55–6.89) | 0.002 |
 ITN use | 2.71 (2.14–3.44) | < 0.001 | 3.79 (2.91–4.92) | < 0.001 | 0.20 (0.06–0.66) | 0.008 |