Table 2.
Goodness-of-fit indices, item-scale convergent validity, internal consistency reliability, and floor/ceiling effects of the HLS-SF12.
| Total Sample (N = 440) |
|
|---|---|
| Absolute model fit 1 | |
| RMSEA | 0.09 |
| GFI | 0.94 |
| Incremental fit 1 | |
| AGFI | 0.89 |
| CFI | 0.85 |
| IFI | 0.86 |
| NFI | 0.82 |
| Parsimonious fit 1 | |
| χ2/df | 4.34 |
| Item-scale convergent validity, range of correlations (rho) | |
| GHL | 0.49–0.64 |
| HC-HL | 0.66–0.74 |
| DP-HL | 0.62–0.73 |
| HP-HL | 0.63–0.73 |
| Reliability, Cronbach’s alpha | |
| GHL | 0.79 |
| HC-HL | 0.65 |
| DP-HL | 0.56 |
| HP-HL | 0.60 |
| Floor effects, % | |
| GHL | 0.50 |
| HC-HL | 7.70 |
| DP-HL | 1.40 |
| HP-HL | 1.80 |
| Ceiling effect, % | |
| GHL | 0.00 |
| HC-HL | 1.40 |
| DP-HL | 1.40 |
| HP-HL | 5.00 |
1 Structure Equation Model of the HLS-SF12 with 12 items loading into three domains of health (health care, disease prevention, health promotion). Abbreviations: HLS-SF12, short-form health literacy questionnaire; RMSEA, root mean square error of approximation; GFI, goodness-of-fit index; AGFI, adjusted goodness-of-fit index; CFI, comparative fit index; IFI, incremental fit index; NFI, normal fit index; χ2/df, relative chi-square; GHL, general health literacy; HC-HL, health care health literacy; DP-HL, disease prevention health literacy; HP-HL, health promotion health literacy.