Table 4.

Proposed TND score sample size ($n_{\mathit{p}}$) and the case-control score sample size ($n_{\mathit{s}}$) for 90% and 95% vaccine effectiveness (VE) across 10%–90% vaccine coverage ($p_{\mathit{N}}$) with 0.025 type I error and 80% desired power.

VE	Vaccine Coverage ($p_{\mathit{N}}$)
	10%		30%		50%		70%		90%
	$n_{\mathit{s}}$	$n_{\mathit{p}}$	$n_{\mathit{s}}$	$n_{\mathit{p}}$	$n_{\mathit{s}}$	$n_{\mathit{p}}$	$n_{\mathit{s}}$	$n_{\mathit{p}}$	$n_{\mathit{s}}$	$n_{\mathit{p}}$
90%	225	268	81	91	55	60	50	54	82	95
95%	179	228	63	75	46	46	36	39	53	62