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Table 4 Estimated effect of assignment to web-based versus manual-based connect at both agency and individual/participant levels: longitudinal multilevel analysis

From: Implementation of a couple-based HIV prevention program: a cluster randomized trial comparing manual versus Web-based approaches

  Agency level (N=80)1 Individual level (N=253)2
  Negative Binomial Regression Estimates Negative Binomial Regression Estimates
  IRR CI p IRR CI p
Total number of couples       
Average of 3 waves 0.35* 0.13 - 0.94 0.038 0.45 0.14 - 1.45 0.181
At 6-month only 0.27* 0.09 - 0.84 0.024 0.30 0.08 - 1.10 0.070
At 12-month only 0.36* 0.13 - 0.99 0.047 0.43 0.13 - 1.40 0.163
At 18-month only 0.49 0.16 - 1.55 0.226 0.62 0.18 - 2.20 0.464
  Linear Regression Estimates Linear Regression Estimates
  b CI p b CI p
Mean number of sessions completed       
Average of 3 waves -0.31 -0.68 - 0.06 0.101 -0.25 -0.57 - 0.08 0.137
At 6-month only -0.38 -0.80 - 0.04 0.079 -0.29 -0.66 - 0.08 0.124
At 12-month only -0.31 -0.68 - 0.06 0.101 -0.25 -0.58 - 0.08 0.133
At 18-month only -0.25 -0.67 - 0.18 0.257 -0.21 -0.59 - 0.17 0.279
  Logistic Regression Estimates Logistic Regression Estimates
  OR CI p OR CI p
Implement at least 1 session       
Average of 3 waves 0.30 0.06 - 1.46 0.136 0.34 0.09 - 1.26 0.105
At 6-month only 0.23 0.03 - 1.50 0.124 0.23 0.05 - 1.09 0.063
At 12-month only 0.30 0.06 - 1.47 0.137 0.34 0.09 - 1.25 0.104
At 18-month only 0.40 0.06 - 2.57 0.332 0.49 0.11 - 2.22 0.354
Completed at least 1 cycle       
Average of 3 waves 0.80 0.12 - 5.55 0.819 0.71 0.13 - 3.84 0.691
At 6-month only 1.06 0.05 - 21.1 0.972 0.67 0.05 - 8.31 0.756
At 12-month only 0.82 0.09 - 7.54 0.861 0.66 0.10 - 4.44 0.667
At 18-month only 0.64 0.06 - 7.32 0.717 0.65 0.09 - 4.74 0.666
  1. *p<0.05.
  2. Note:
  3. 1. Measurements at the agency level:
  4. a. Number of couples at the agency level = sum(# couple a facilitator reported).
  5. b. Mean number of sessions completed at the agency level = sum(mean number of sessions completed by a facilitator)/(number of facilitator in an agency).
  6. c. Implemented at least 1 session at the agency level = at least one facilitator reported implementing at least one session in an agency.
  7. d. Completed at least 1 cycle at the agency level = at least one facilitator reported completing at least one cycle in an agency.
  8. 2. Measurements at the individual level:
  9. a. Number of couples at the individual level = sum(# couple a facilitator reported).
  10. b. Mean number of sessions completed at the individual level = sum(number of sessions completed with a couple)/(number of couples).
  11. c. Implemented at least 1 session at the individual level = facilitators reported implementing at least one session.
  12. d. Completed at least 1 cycle at the individual level = facilitators reported completing at least one cycle.