Table 2.

Intra-class correlation coefficients (ICCs) for comparisons of DC values by processing group

	Group 1, U.S. (N = 69)		Group 2, Ethiopia (N = 131)
	ICC (95% CI)	Mean difference† (95% CI)	ICC* (95% CI)	Mean difference† (95% CI)
Intra-eye, intra-swab: runs 1 and 2	0.998 (0.997 to 0.999)	0.01 (−0.06 to 0.07)	0.96 (0.95 to 0.97)	0.01 (−0.12 to 0.14)
Intra-eye, inter-swab: runs 1 and 3	0.91 (0.87 to 0.95)	0.61 (0.16 to 1.06)	0.89 (0.86 to 0.92)	−0.16 (−0.40 to 0.09)
Inter-eye, inter-swab: runs 1 and 4	0.87 (0.81 to 0.92)	0.02 (−0.53 to 0.57)	0.89 (0.86 to 0.92)	−0.35 (−0.58 to −0.11)

^*As calculated from linear mixed-effects regression models with crossed random effects for child, eye, and swab.

^†Difference in DC value for run 1 minus the other run; positive number indicates higher load in run 1.