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Table 2 Estimated changes in appointment keeping and medication gaps resulting from the intervention among experienced and newly treated patients

From: Facility-level intervention to improve attendance and adherence among patients on anti-retroviral treatment in Kenya—a quasi-experimental study using time series analysis

    Pre-intervention trend (% per month) Change in level (absolute) Change in trend (% per month)
Indicator Cohort Group Coefficient (± 95% CI) p-value Coefficient (± 95% CI) p-value Coefficient (± 95% CI) p-value
Keeping appointment or attending before appointment Exp. Intervention -0.25 (-0.54, 0.04) 0.096 5.67 (2.07, 9.28) 0.002 1.04 (0.61, 1.47) <0.001
Control 0.12 (-0.21, 0.45) 0.485 -2.78 (-7.72, 2.15) 0.268 0.64 (-0.05, 1.34) 0.071
Difference -0.52 (-1, -0.04) 0.033 9.56 (-16.07, -3.04) 0.004 0.48 (-1.29, 0.33) 0.248
New Intervention -0.14 (-0.72, 0.43) 0.622 8.75 (1.21, 16.29) 0.023 -0.44 (-1.39, 0.51) 0.365
Control 0.08 (-0.45, 0.61) 0.769 -1.8 (-9.84, 6.23) 0.660 0.85 (-0.16, 1.85) 0.100
Difference -0.72 (-1.7, 0.26) 0.147 15.39 (-26.4, -4.38) 0.006 -1.23 (-0.31, 2.76) 0.117
Keeping appointment within 3 days Exp. Intervention -0.18 (-0.38, 0.01) 0.064 4.16 (1.63, 6.69) 0.001 0.84 (0.58, 1.09) <0.001
Control 0.31 (-0.15, 0.76) 0.186 0.49 (-5.41, 6.4) 0.870 -0.12 (-0.88, 0.65) 0.765
Difference -0.71 (-1.17, -0.25) 0.003 6.46 (1.35, 11.58) 0.013 0.96 (0.16, 1.77) 0.019
New Intervention 0.23 (-0.44, 0.89) 0.503 2.68 (-5.34, 10.69) 0.513 0.02 (-1.35, 1.4) 0.973
Control 0.23 (-0.12, 0.58) 0.194 -1.13 (-9.68, 7.43) 0.796 0.11 (-0.86, 1.08) 0.823
Difference -0.27 (-0.87, 0.33) 0.374 7.85 (-17.16, 1.45) 0.098 -0.31 (-0.8, 1.42) 0.585
Medication gap more than 14 days Exp. Intervention -0.15 (-0.62, 0.32) 0.523 -11.3 (-22.72, 0.07) 0.051 0.18 (-1.09, 1.46) 0.778
Control -0.48 (-0.94, -0.02) 0.041 -0.68 (-6.03, 4.66) 0.802 0.13 (-0.62, 0.87) 0.739
Difference 0.33 (-0.37, 1.02) 0.355 -10.64 (-22.62, 1.33) 0.081 0.06 (-1.22, 1.34) 0.931
New Intervention -0.37 (-1.42, 0.67) 0.484 -8.24 (-19.13, 2.65) 0.138 0.9 (-0.52, 2.32) 0.212
Control 0.05 (-0.44, 0.54) 0.830 -3.87 (-12.43, 4.69) 0.376 0.14 (-1.15, 1.42) 0.833
   Difference -0.43 (-1.75, 0.90) 0.529 -4.37 (-17.6, 8.86) 0.517 0.77 (-1.15, 2.68) 0.434
  1. Exp. = Experienced patients, New = Newly treated patients; Figures in bold show significant differences between intervention and control group.