Table 4 Analysis of concordance between three observers in the study and control groups.

Diagnosis	Modified counterstain			Conventional counterstain			Conventional counterstain and smear test
	κ*	95% CI	p Value†	κ*	95% CI	p Value†	κ*	95% CI	p Value†
WNL	0.842	0.616 to 1.069	<0.001	0.435	0.225 to 0.645	<0.001	0.284	0.127 to 0.440	0.004
ASC‐US	0.306	0.079 to 0.532	0.004	0.174	−0.036 to 0.384	0.052	0.380	0.224 to 0.537	<0.001
ASC‐H	−0.042	−0.268 to 0.185	0.641	−0.088	−0.298 to 0.123	0.793	−0.061	−0.218 to 0.096	0.715
LSIL	0.781	0.554 to 1.007	<0.001	0.731	0.521 to 0.942	<0.001	0.839	0.682 to 0.995	<0.001
HSIL	0.945	0.719 to 1.171	<0.001	0.761	0.551 to 0.971	<0.001	0.815	0.658 to 0.971	<0.001
Combined‡	0.773	0.622 to 0.923	<0.001	0.549	0.427 to 0.671	<0.001	0.642	0.544 to 0.739	<0.001

ASC‐H, abnormal squamous cells, high‐grade lesion cannot be excluded; ASC‐US, abnormal squamous cells of undetermined significance; HSIL, high‐grade squamous intraepithelial lesion; LSIL, low‐grade squamous intraepithelial lesion; WNL, within normal limits.

*Landis–Koch extension.

†p Value for the test z (for κ = 0).

‡Combined κ (Fleiss–Nee–Landis test).