Table 1.

Power and sample size calculations using the coefficient of variation between clusters in the Linkage to Care study in uThukela district between December 2017 – August 2019

Matched pairs
p1	p2	delta	alpha	Beta	k1	k2	m1	m2	rho	N
0.62	0.72	0.10	0.05	0.80	9	9	50	50	0.02	900

Where p - linkage to care proportions; delta – difference between proportions; alpha - z values used for calculating type 1 error; beta - z value used for calculating power; rho – inter-cluster correlation; m – average cluster size and k - number of clusters. N - sample size for study period allowing for cluster randomization