TABLE 2.
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.