Table 1.

Sample size calculation

Variable	p	d	Z	N
IgM+	0.95	0.06	95%	50
IgG+	0.83	0.06	95%	151
IgM- IgG-	0.90	0.06	95%	96
Other infection	0.95	0.06	95%	50

N sample size, Z Confidence level, P expected sensitivity and d precision