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. 2022 Jun 20;39(1):137–153. doi: 10.1002/smi.3177

TABLE 2.

Mokken scale properties of the occupational depression inventory: scalability, reliability, and monotonicity

French sample (N = 3454) Swiss sample (N = 1971) Australian sample (N = 1485)
Scalability and reliability Monotonicity Scalability and reliability Monotonicity Scalability and reliability Monotonicity
H i SE 95% CI #vi #zsig crit H i SE 95% CI #vi #zsig crit H i SE 95% CI #vi #zsig crit
ODI1 0.59 0.01 [0.57, 0.61] 0 0 0 0.54 0.02 [0.51, 0.57] 0 0 0 0.64 0.01 [0.61, 0.66] 0 0 0
ODI2 0.61 0.01 [0.60, 0.63] 0 0 0 0.55 0.02 [0.52, 0.58] 0 0 0 0.63 0.01 [0.61, 0.65] 0 0 0
ODI3 0.56 0.01 [0.54, 0.58] 0 0 0 0.54 0.02 [0.51, 0.56] 0 0 0 0.55 0.02 [0.52, 0.58] 0 0 0
ODI4 0.60 0.01 [0.58, 0.61] 0 0 0 0.57 0.01 [0.54, 0.59] 0 0 0 0.58 0.02 [0.55, 0.61] 0 0 0
ODI5 0.51 0.01 [0.49, 0.53] 0 0 0 0.51 0.02 [0.48, 0.55] 0 0 0 0.53 0.02 [0.49, 0.56] 1 0 2
ODI6 0.55 0.01 [0.53, 0.57] 0 0 0 0.49 0.02 [0.46, 0.53] 0 0 0 0.57 0.01 [0.54, 0.60] 0 0 0
ODI7 0.60 0.01 [0.59, 0.62] 0 0 0 0.58 0.01 [0.55, 0.60] 0 0 0 0.64 0.01 [0.61, 0.66] 0 0 0
ODI8 0.57 0.01 [0.55, 0.59] 0 0 0 0.56 0.02 [0.53, 0.59] 0 0 0 0.59 0.01 [0.56, 0.61] 0 0 0
ODI9 0.59 0.02 [0.55, 0.63] 0 0 0 0.49 0.03 [0.44, 0.55] 0 0 0 0.62 0.02 [0.59, 0.65] 0 0 0
H 0.57 0.01 [0.56, 0.59] 0.54 0.01 [0.52, 0.56] 0.59 0.01 [0.57, 0.62]
λ2 0.90 0.89 0.90
MS 0.90 0.89 0.91
H T 0.56 0.38 0.52

Note: H: scale‐level H; H i : item‐level H; H T : invariant item ordering; λ2: Guttman's lambda‐2; MS: Molenaar‐Sijtsma statistic; SE: standard error; 95% CI: 95% confidence interval; #vi: violations; #zsig: significant violations; crit: serious violations―items for which the crit statistic reaches 80 seriously violate requirements. ODI1: anhedonia; ODI2: depressed mood; ODI3: sleep alterations; ODI4: fatigue/loss of energy; ODI5: appetite alterations; ODI6: feelings of worthlessness; ODI7: cognitive impairment; ODI8: psychomotor alterations; ODI9: suicidal ideation.