Table 7.

Interobserver analysis for the Hohl classification.

Obs 1 x Obs 2	Observed agreement	Kappa coefficient	Kappa SE	p-value
MS x R3_1	68.0	0.577	0.076	< 0.0001
MS x R3_2	64.0	0.526	0.076	< 0.0001
MS x R2_1	60.0	0.478	0.073	< 0.0001
MS x R2_2	60.0	0.452	0.078	< 0.0001
MS x R1_1	52.0	0.348	0.078	< 0.0001
MS x R1_2	52.0	0.344	0.077	< 0.0001
R3_1 x R3_2	60.0	0.491	0.070	< 0.0001
R3_1 x R2_1	62.0	0.509	0.074	< 0.0001
R3_1 x R2_2	66.0	0.547	0.076	< 0.0001
R3_1 x R1_1	58.0	0.441	0.076	< 0.0001
R3_1 x R1_2	60.0	0.462	0.078	< 0.0001
R3_2 x R2_1	54.0	0.424	0.067	< 0.0001
R3_2 x R2_2	54.0	0.413	0.069	< 0.0001
R3_2 x R1_1	54.0	0.414	0.069	< 0.0001
R3_2 x R1_2	42.0	0.272	0.064	< 0.0001
R2_1 x R2_2	54.0	0.392	0.075	< 0.0001
R2_1 x R1_1	50.0	0.338	0.075	< 0.0001
R2_1 x R1_2	52.0	0.361	0.076	< 0.0001
R2_2 x R1_1	60.0	0.446	0.080	< 0.0001
R2_2 x R1_2	60.0	0.441	0.081	< 0.0001
R1_1 x R1_2	66.0	0.525	0.082	< 0.0001

Obs: observer; MS: medical specialists, R3: third-year resident, R2: second-year resident; R1: first-year resident, SE: standard error.

Source: SOT-HMMC, 2006.