TABLE 3.

Predicted power (%) of the GEE analyses with the independence or arm-specific exchangeable working correlation (SEE) when the cluster sizes are all equal (CV η = 0)

(exp(β0), exp(β1))	$\left({\sigma }_0^2,{\sigma }_1^2\right)$	N	$\overline{m}$	T = ∞	T = 6	T = 5	T = 4	T = 3	T = 2	T = 1
(1.25, 0.70)	(0.05, 0.05)	30	15	79.7	79.6	79.1	77.7	73.3	61.9	37.1
	(0.10, 0.10)	30	45	75.9	76.1	76.2	76.0	74.7	70.5	56.9
	(0.20, 0.20)	60	35	78.3	79.2	79.5	79.7	79.2	76.5	66.6
	(0.30, 0.30)	90	40	78.7	80.7	81.3	81.8	81.8	80.5	74.3
	(0.40, 0.40)	110	40	73.8	77.4	78.3	79.0	79.3	78.4	73.5
(2.70, 0.70)	(0.05, 0.05)	25	10	79.1	76.8	73.6	67.4	56.6	40.0	20.4
	(0.10, 0.10)	30	30	78.0	78.4	77.5	75.6	71.6	63.3	44.4
	(0.20, 0.20)	55	20	75.3	77.2	76.6	75.1	71.9	65.2	48.7
	(0.30, 0.30)	80	30	74.6	78.7	78.6	78.0	76.4	72.9	62.8
	(0.40, 0.40)	110	25	74.3	80.1	80.1	79.6	78.2	75.1	65.8