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Internal consistency and floor and ceiling effects of the 14-item health literacy scale (HLS-14)
| Mean ± SD | Cronbach’s alpha | Lowest score, N (%) | Highest score, N (%) | |
|---|---|---|---|---|
| Total health literacy score, Q1–Q14 | 50.3 ± 6.8 | 0.81 | 0 (0.0) | 1 (0.1) |
| Functional health literacy score, Q1–Q5 | 19.1 ± 3.6 | 0.83 | 1 (0.1) | 120 (8.0) |
| Communicative health literacy score, Q6–Q10 | 17.8 ± 3.6 | 0.85 | 10 (0.7) | 41 (2.7) |
| Critical health literacy score, Q11–Q14 | 13.4 ± 2.7 | 0.76 | 12 (0.8) | 16 (1.1) |
