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Table 3 Female P. arentipes sand fly per household in pooled as well as site specific data and their comparison between interventions and control arm at baseline and follow-up time

From: Entomological efficacy of durable wall lining with reduced wall surface coverage for strengthening visceral leishmaniasis vector control in Bangladesh, India and Nepal

Survey

Mean (95 % CI) Female P. argentipes sand fly per household

p-value for test of differences

 

DWL-RWSC

DWL-FWSC

Control

IDWL-RWSC vs Control

IDWL-FWSC vs Control

Pooled

     

 - Baseline

6.65 (5.70, 7.72)

7.15 (6.16, 8.26)

7.92 (6.88, 9.08)

0.6792

0.0934

 - End line

2.00 (1.49, 2.62)

2.92 (2.30, 3.66)

8.65 (7.56, 9.86)

<0.0001

<0.0001

 - Difference in differences compared to control arma

−5.38 (−4.89, −5.88)

−4.96 (−4.54, −5.38)

  

Site specific

     

Bangladesh

 - Baseline

7.2 (5.63, 9.07)

4.1 (2.94, 5.56)

9.8 (7.96, 11.94)

0.9394

0.0245

 - End line

2.9 (1.94, 4.16)

1.5 (0.84, 2.47)

8.3 (6.61, 10.29)

0.0566

0.0061

 - Difference in differences compared to control arm a

−2.8 (−2.34, −3.26)

−1.1 (−0.75, −1.44)

  

India

 - Baseline

9.0 (6.76, 11.74)

4.0 (2.56, 5.95)

8.67 (6.47, 11.37)

0.8661

0.0056

 - End line

0.33 (0.04, 1.20)

0.17 (0.00, 0.93)

4.67 (3.10, 6.74)

0.0035

0.0028

 - Difference in differences compared to control arm

−4.67 (−3.35, −5.91)

0.17 (−0.39, 0.81)

  

Nepal

 - Baseline

4.7 (3.45, 6.25)

12.1 (10.04, 14.46)

5.6 (4.23, 7.27)

0.4930

0.2385

 - End line

2.1 (1.30, 3.21)

6.0 (4.58, 7.72)

11.4 (9.40, 13.69)

0.0060

0.0366

 - Difference in differences compared to control arm a

−8.4 (−7.32, −9.46)

−11.9 (−10.43, −13.16)

  
  1. Abbreviations: WL-RWSC wall surface coverage with DWL up to 1.5 m in height from floor, DWL-FWSC wall surface coverage with DWL up to 1.8 m in height from floor, Control = no intervention
  2. aDifference in differences compared to control arm = mean (B-A) – mean (D-C) Where, A = baseline count for the intervention group; B = post-intervention count for the intervention group; C = baseline count for the control group; D = post-intervention count for the control group. The difference in differences is zero if there are no changes of Female P. argentipes sand fly density after intervention. Negative sign represent reduction of Female P. argentipes sand fly count whereas positive sign represents increment