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Table 4 Sample size estimations for the VIBRA trial

From: VIBRA trial – Effect of village-based refill of ART following home-based same-day ART initiation vs clinic-based ART refill on viral suppression among individuals living with HIV: protocol of a cluster-randomized clinical trial in rural Lesotho

Control rate of viral suppression Intervention rate of viral suppression Power Intra-cluster correlation coefficient Average number of eligible individuals per cluster Total number of clusters Total sample size
0.5 0.7 0.9 0.015 4 120 478
0.5 0.7 0.9 0.015 3 160 478
0.5 0.7 0.9 0.015 2 240 478
0.5 0.7 0.8 0.015 4 66 262
0.5 0.7 0.8 0.015 3 88 262
0.5 0.7 0.8 0.015 2 130 262
0.5 0.75 0.9 0.015 4 49 195
0.5 0.75 0.9 0.015 3 65 195
0.5 0.75 0.9 0.015 2 98 195
0.5 0.75 0.8 0.015 4 33 130
0.5 0.75 0.8 0.015 3 44 130
0.5 0.75 0.8 0.015 2 65 130