Table 1.
Mean ages and socioeconomic status of study patients in 1992/1993 and 2016/2017
| 1992/1993 | 2016/2017 | |
|---|---|---|
| Age in years (±SEM) | 38 (14) | 49 (15) |
| Socioeconomic status (%) | ||
| Low | 64 (40) | 432 (38) |
| Middle | 75 (47) | 588 (51) |
| High | 21 (13) | 125 (11) |
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