Table 3.

Bland-Altman agreement between WC-NIH and WC-WHO

	Overall	Males	Females
N	221	99	122
Limits of Agreement	-14.12 to 18.50	-15.89 to 14.18	-11.01 to 20.34
Mean difference between WC-NIH and WC-WHO (95% CI), cm	2.19 (1.11 to 3.27)	-0.85 (-2.35 to 0.65)	4.67 (3.26 to 6.07)
Range, cm	75.0 to 190.0	83.5 to 190.0	75.0 to 155.0
Pitman’s Test of difference in variance (r)	-0.382	-0.375	-0.24
P-Value	<0.001*	<0.001*	0.008*

Limits of agreement = mean diff. ± 1.96*std dev. We expect that 95% of the differences will lie within the limits of agreement.

^*p-value <0.05