Table 1 Segmented regression analysis of hepatitis B vaccination timeliness comparing intervention and control health facilities in The Gambia, 2019 – 2020
Measure | All intervention health facilities (HFs) (n = 41,720) | Intervention HFs with increasing pre-treatment vaccination timeliness (n = 20,596) Percentage (95% CI) | Intervention HFs with decreasing pre-treatment vaccination timeliness (n = 15,809) Percentage (95% CI) | Intervention HFs with plateaued pre-treatment vaccination timeliness (n = 5,315) Percentage (95% CI) |
|---|---|---|---|---|
Pre-mean level (control health facilities) | 15.39% (10.85% to 19.93%) | 10.07% (4.94% to 15.2%) | 20.33% (17.28% to 23.39%) | 11.84% (2.94% to 20.73%) |
Pre-trend (control health facilities) | 0.82% (-0.23% to 1.87%) | 1.06% (-0.08% to 2.21%) | -0.5% (-1.06% to 0.06%) | 0.83% (-0.49% to 2.14%) |
Post-level difference (control health facilities) | -6.99% (-16.93% to 2.96%) | -7.85% (-17.84% to 2.13%) | 4.06% (-4.13% to 12.26%) | -2.24% (-15.15% to 10.66%) |
Post-trend (health facility) | -1.39% (-2.51% to -0.27%) | -1.38% (-2.64% to -0.12%) | -0.61% (-1.45% to 0.23%) | -1.68% (-3.31% to -0.04%) |
Pre-level difference (intervention – control health facilities) | 1.6% (-5.43% to 8.64%) | -2.40% (-8.03% to 3.24%) | 12.04% (-3.16% to 27.24%) | -1.83% (-11.22% to 7.57%) |
Pre-trend difference (intervention – control health facilities) | -1.01% (-2.37% to 0.35%) | 0.19% (-1.11% to 1.49%) | -1.72% (-3.92% to 0.48%) | -0.83% (-2.3% to 0.63%) |
Post- level difference (intervention – control health facilities) | 12.92% (1.57% to 24.28%) | 2.5% (-10.03% to 15.02%) | 15.47% (0.48% to 30.47%) | 11.53% (-4.89% to 27.96%) |
Post-trend difference (intervention – control health facilities) | 1.07% (0.31% to 1.83%) | 1.09% (0.23% to 1.96%) | 1.39% (-0.11% to 2.88%) | 0.90% (-0.62% to 2.41%) |
Pre- post-trend difference (intervention – control health facilities) | 2.08% (0.56% to 3.61%) | 0.90% (-0.57% to 2.38%) | 3.11% (0.42% to 5.80%) | 1.73% (-0.25% to 3.70%) |