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Baseline characteristics of the study population.
| Characteristics | Spectacles | Contact lenses | Control | All |
|---|---|---|---|---|
| N | 48 | 15 | 16 | 79 |
| Male | 26 | 5 | 7 | 38 |
| Female | 22 | 10 | 9 | 41 |
| Mean age in years (SD) | 54 (17)a | 43 (10) | 39 (14)a | 48 (16.5) |
aA statistical significant difference in age between spectacles group and the control group (p = 0.005).
