Table 3 Institutional delivery compared between intervention and control areas by quintile
| Â | Number (%) of mothers in intervention | Number (%) of mothers in control | Crude mean difference (95% CI) | P value | Adjusted mean differencea (95% CI) | P value |
|---|---|---|---|---|---|---|
Unrestricted analysis | ||||||
Overall | n = 2432 | n = 2469 | n = 4901 |  | n = 3883 |  |
 Baseline (n = 2441) | 744/1182 (62.9%) | 726/1236 (58.7%) |  |  |  |  |
 Endline (n = 2491) | 965/1250 (77.2%) | 827/1233 (67.1%) |  |  |  |  |
 Difference | 14.3% | 8.4% | 5.9% (0.01–0.11) | 0.027 | 3.3% (−0.14–0.21) | 0.685 |
Quintile 1 (poorest) |  |  | n = 888 |  | n = 708 |  |
 Baseline (n = 465) | 55/111 (49.6%) | 165/354 (46.6%) |  |  |  |  |
 Endline (n = 423) | 119/165 (72.1%) | 178/258 (69.0%) |  |  |  |  |
 Difference | 22.5% | 22.4% | 0.1% (−0.14–0.14) | 0.979 | 0.8% (− 0.30–0.32) | 0.953 |
Quintile 2 |  |  | n = 869 |  | n = 753 |  |
 Baseline (n = 446) | 141/220 (64.1%) | 125/226 (55.3%) |  |  |  |  |
 Endline (n = 423) | 192/254 (75.6%) | 105/169 (62.1%) |  |  |  |  |
 Difference | 11.5% | 6.8% | 4.7% (−0.08–0.18) | 0.475 | 5.4% (− 0.14–0.24) | 0.541 |
Quintile 3 |  |  | n = 878 |  | n = 801 |  |
 Baseline (n = 455) | 190/290 (65.5%) | 99/165 (60.0%) |  |  |  |  |
 Endline (n = 423) | 149/200 (74.5%) | 153/223 (68.6%) |  |  |  |  |
 Difference | 9.0% | 8.6% | 0.4% (−0.12–0.13) | 0.954 | −3.0% (− 0.27–0.20) | 0.781 |
Quintile 4 |  |  | n = 876 |  | n = 780 |  |
 Baseline (n = 459) | 153/239 (64.0%) | 161/220 (73.2%) |  |  |  |  |
 Endline (n = 417) | 142/142 (71.3%) | 135/218 (61.9%) |  |  |  |  |
 Difference | 7.3% | −11.3% | 18.6% (0.06–0.31) | 0.003 | 10.7% (−0.20–0.42) | 0.465 |
Quintile 5 |  |  | n = 869 |  | n = 841 |  |
 Baseline (n = 447) | 150/235 (63.8%) | 143/212 (67.5%) |  |  |  |  |
 Endline (n = 422) | 253/270 (93.7%) | 126/152 (82.9%) |  |  |  |  |
 Difference | 29.9% | 15.4% | 14.4% (0.03–0.26) | 0.011 | 6.6% (−0.20–0.33) | 0.602 |
Restricted analysisb | ||||||
Overall | n = 1524 | n = 2275 | n = 3799 |  | n = 2938 |  |
 Baseline (n = 2418) | 744/1182 (62.9%) | 726/1236 (58.7%) |  |  |  |  |
 Endline (n = 1381) | 291/342 (85.1%) | 690/1039 (66.4%) |  |  |  |  |
 Difference | 22.2% | 7.7% | 14.5% (0.08–0.21) | < 0.001 | 6.1% (− 0.17–0.29) | 0.575 |
Quintile 1 (poorest) | n = 128 | n = 591 | n = 719 |  | n = 542 |  |
 Baseline (n = 465) | 55/111 (49.6%) | 165/354 (46.6%) |  |  |  |  |
 Endline (n = 254) | 13/17 (76.5%) | 165/237 (69.6%) |  |  |  |  |
 Difference | 26.9% | 23.0% | 3.9% (−0.20–0.28) | 0.746 | −0.7% (− 0.42–0.41) | 0.971 |
Quintile 2 | n = 238 | n = 366 | n = 604 |  | n = 491 |  |
 Baseline (n = 446) | 141/220 (64.1%) | 125/226 (55.3%) |  |  |  |  |
 Endline (n = 158) | 17/18 (94.4%) | 89/140 (63.6%) |  |  |  |  |
 Difference | 30.3% | 8.3% | 22.0% (0.06–0.38) | 0.007 | 21.4% (0.07–0.36) | 0.008 |
Quintile 3 | n = 329 | n = 352 | n = 681 |  | n = 607 |  |
 Baseline (n = 455) | 190/290 (65.5%) | 99/165 (60.0%) |  |  |  |  |
 Endline (n = 226) | 28/39 (71.8%) | 131/187 (70.1%) |  |  |  |  |
 Difference | 6.3% | 10.1% | −3.8% (−0.22–0.14) | 0.684 | −5.8% (−0.35–0.24) | 0.673 |
Quintile 4 | n = 295 | n = 408 | n = 703 |  | n = 609 |  |
 Baseline (n = 459) | 153/239 (64.0%) | 161/220 (73.2%) |  |  |  |  |
 Endline (n = 244) | 40/56 (71.4%) | 114/188 (60.6%) |  |  |  |  |
 Difference | 7.4% | −12.6% | 20.0% (0.04–0.36) | 0.016 | 6.3% (−0.30–0.42) | 0.709 |
Quintile 5 | n = 410 | n = 305 | n = 715 |  | n = 689 |  |
 Baseline (n = 447) | 150/235 (63.8%) | 143/212 (67.5%) |  |  |  |  |
 Endline (n = 268) | 168/175 (96.0%) | 71/93 (76.3%) |  |  |  |  |
 Difference | 32.2% | 8.8% | 23.4% (0.11–0.36) | < 0.001 | 13.5% (−0.21–0.48) | 0.404 |