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Table 2 Time-series analysis for weekly FP services utilization by HIV-infected mothers during the study

From: Greater involvement of HIV-infected peer-mothers in provision of reproductive health services as “family planning champions” increases referrals and uptake of family planning among HIV-infected mothers

  Pre-Intervention Intervention Post Intervention
Indicator Base level, β0 p-value Base trend, β1 p-value Change in level, β2 p-value Change in trend, β3 p-value Change in level, β4 p-value Change in trend, β5 p-value
(i) Proportion (%) of FP usage among mothers attending PNC/PMTCT 64.2 <0.001 0.1 0.784 4.2 0.389 0.4 0.351 −5.4 0.01 −0.2 0.603
(ii) Proportion (%) of referrals among mothers not using and in need FP 74.7 <0.001 −3.0 0.005 48.7 <0.001 2.9 0.077 8.3 0.701 −1.5 0.375
(iii) Proportion(%) of FP uptake among mothers referred,not using and in need of FP 61.0 <0.001 −1.5 0.110 29.4 0.006 1.9 0.176 5.2 0.773 −1.9 0.338
(iv) Proportion(%) of FP refills among mothers receiving FP 45.2 <0.001 −1.7 0.002 11.9 0.020 1.5 0.010 9.2 0.015 0.1 0.860
  1. Segmented regression of interrupted time-series models were fitted with an autoregressive term of one to measure the changes in levels and trends across the study phases. Positive coefficients represent increasing % whereas negative coefficients represent declining %. β 0 is the proportion at the onset of the pre-intervention phase
  2. β 1 is the change in rate(trend) of the proportion during the pre-intervention phase. β 2 is the change in proportion at the onset of the intervention phase. β 3 is the change in rate(trend) of the proportion as compared to the rate (β 1 ), in the pre-intervention phase. β 4 is the change in proportion at the onset of the post-intervention phase. β 5 is the change in rate(trend) of proportion as compared to the rate (β 3 ) in the intervention phase. p- values correspond to the statistical significance level for the corresponding adjacent coefficient