Table 1

Baseline characteristics by treatment arm (n, %)

Control
(n=1273)
Advanced planning
(n=1267)
Block leader recruitment
(n=1180)
Contingent group lottery
(n=1202)
Total sample
(n=4922)
Pearson χ2 P values
Cycle 1 household status
  Sprayed, infested49 (3.9%)37 (2.9%)39 (3.1%)40 (3.3%)165 (3.4%)1.710.64
  Sprayed, not infested1004 (78.9%)1005 (79.3%)892 (75.6%)944 (78.5%)3845 (78.1%)6.010.11
  Closed104 (8.2%)94 (7.4%)74 (6.3%)80 (6.7%)352 (7.2%)3.940.27
  Refused98 (7.7%)106 (8.4%)118 (10.0%)123 (10.2%)445 (9.0%)6.890.08
  Uninhabited12 (0.9%)15 (1.2%)8 (0.7%)10 (0.8%)45 (0.9%)1.840.61
  Vacant lot2 (0.2%)1 (0.1%)48 (4.1%)2 (0.2%)53 (1.1%)130.4<0.01
  Public lot4 (0.3%)9 (0.7%)1 (0.1%)3 (0.3%)17 (0.4%)7.580.06
  • Sprayed: house was treated with insecticide by campaign brigade. Infested: campaign staff found evidence of infestation by triatomine insects. Closed: no household member answered the door during campaign visits. Refused: household declined to allow the campaign to spray the house.