Table 3.
Validity and Reliability Tests for Short Form 12, Version 2 (Physical Component Score and Mental Component Score), Patient Activation Measure 13, and Kessler 10
| SF12 | PAM13 | K10 | |
|---|---|---|---|
| Construct validity | |||
| Chi-square | - | 972.0** | 1717.3** |
| NNFI | - | 0.827 | 0.886 |
| CFI | - | 0.867 | 0.912 |
| RMSEA | - | 0.109 | 0.127 |
| Discriminant validity | |||
| Mean difference between ≤65 and >65 years | −5.5 (PCS) ** −0.8 (MCS) |
−0.4 | −0.4 |
| Mean difference between non–highly and highly educated | −4.7** (PCS) −1.5** |
−7.6** | 1.6** |
| Reliability | |||
| Cronbach α | 0.93 | 0.89 | 0.92 |
| Guttman λ 6 | 0.95 | 0.90 | 0.93 |
| Split-half | 0.90 | 0.83 | 0.93 |
*
Sig ≤0.05.
**
Sig <0.001.
CFI, Comparative Fit Index; K10, Kessler 10; MCS, Mental Component Score; NNFI, Non-Normed Fit Index; PAM13, Patient Activation Measure 13; PCS, Physical Component Score; RMSEA, Root Mean Squared Error of Approximation; SF12, Short Form 12 version 2.