Table 1.

Median and 95% confidence intervals around the median (in parentheses) of scaled differences between counts by microscopists A and B categorized by total number of white blood cells (WBCs) counted

	Peru		Thailand
	1998	1999	1998	1999
Both counted 200	0.19	0.18	0.17	0.12
WBC (total = 400)	(0.17, 0.21)	(0.15, 0.22)	(0.15, 0.19)	(0.11, 0.14)
One counted 200	0.46	0.71	0.73	0.83
One counted 500 (total = 700)	(0.29, 0.81)	(0.29, 1.25)	(0.45, 0.97)	(0.72, 0.98)
Both counted 500	0.34	0.20	0.33	0.29
WBCs (total = 1,000)	(0.13, 0.67)	(0.03, 0.5)	(0.24, 0.40)	0.20, 0.38)