Table 3.
Female Phlebotomus argentipes sandfly per household and their comparison between intervention vs. control clusters at baseline and follow-up
| Female P. argentipes sandfly per household; mean (SD) [P-value*] | Effect on count [95% CI]† | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Time | NKTA | Control | P-value | FC + DWL | Control | P-value | FC + ITN | Control | P-value | NKTA | FC + DWL | FC + ITN |
| Baseline | 0.67 (0.93) | 0.44 (0.73) | 0.340 | 0.64 (1.22) | 0.22 (0.48) | 0.272 | 0.22 (0.48) | 0.06 (0.23) | 0.074 | – | – | – |
| 1-Month follow-up | 0.81 (1.12) | 2.58 (4.54) | 0.037 | 0.58 (1.02) | 1.72 (2.59) | 0.009 | 1.53 (3.59) | 7.47 (12.41) | < 0.0001 | −2.00 (−0.77, −3.23) | −1.56 (−0.78, −2.33) | −6.10 (−3.04, −9.19) |
| 3-Month follow-up | 1.03 (1.13) | 5.39 (7.87) | 0.001 | 1.75 (2.61) | 2.75 (3.67) | 0.097 | 1.25 (2.71) | 5.33 (6.67) | < 0.0001 | −4.59 (−2.24, −6.93) | −1.42 (−0.81, −2.02) | −4.24 (−2.83, −5.68) |
| 6-Month follow-up | 0.64 (0.83) | 1.81 (2.91) | 0.199 | 0.94 (1.71) | 1.08 (2.16) | 0.993 | 1.39 (3.03) | 0.69 (0.89) | 0.682 | −1.40 (−0.61, −2.16) | −0.56 (−0.15, −0.95) | 0.54 (−0.11, 1.15) |
| 9-Month follow-up | 0.69 (1.04) | 1.14 (1.46) | 0.169 | 0.78 (1.27) | 0.69 (1.26) | 0.902 | 3.03 (4.96) | 2.06 (2.35) | 0.875 | −0.68 (−0.46, −0.87) | −0.33 (−0.09, −0.57) | 0.81 (0.01, 1.60) |
| 12-Month follow-up | 0.36 (0.83) | 1.17 (1.78) | 0.013 | 0.22 (0.72) | 0.36 (0.64) | 0.147 | 0.39 (0.84) | 0.31 (0.62) | 0.785 | −1.04 (−0.63, −1.42) | −0.56 (−0.33, −0.77) | −0.08 (−0.06, −0.11) |
CI = confidence interval; NKTA = no kala-azar transmission activity; FC + DWL = fever camp and installation of durable wall lining; FC + ITN = fever camp and insecticide-treated net.
* P-value for test of mean differences between intervention and control arms.
† Crude estimated effect in female P. argentipes sandfly counts attributed by the intervention compared with the control arm. See the calculation in statistical analysis.