Tuition lessons in primary school, educational stream, close up work activity and age of onset of myopia (Singapore national servicemen 1998–9)
| Age of onset of myopia | Two sided p value | |||
|---|---|---|---|---|
| Median, mean (SD) | ||||
| Father's highest educational level | ||||
| Primary/secondary | 10.0, 10.2 (2.9) | 0.003 | ||
| Pre-university/tertiary | 9.0, 9.2 (2.7) | |||
| Mother's highest educational level | ||||
| Primary/secondary | 10.0, 10.1 (2.9) | 0.004 | ||
| Pre-university/tertiary | 8.5, 8.8 (2.9) | |||
| Number of parents with myopia | ||||
| None | 10.0, 10.9 (2.9) | <0.001 | ||
| One | 10.0, 9.8 (2.8) | |||
| Two | 9.0, 8.9 (2.8) | |||
| Unknown | 9.0, 9.1 (2.6) | |||
| Past activity | ||||
| Total close up work activity at 7 years | ||||
| = 2 hours per day | 10.0, 10.3 (2.8) | 0.012 | ||
| > 2 hours per day | 9.0, 9.5 (2.9) | |||
| Tuition lessons in primary school | ||||
| Yes | 10.0, 10.l (2.7) | 0.13 | ||
| No | 9.5, 9.8 (2.9) | |||
| Educational stream | ||||
| Normal | 9.0, 9.7 (2.7) | 0.019 | ||
| Gifted/special/express | 10.0, 10.5 (3.3) | |||
| Completed educational level | ||||
| Primary/secondary | 10.0, 10.3 (3.3) | 0.39 | ||
| Pre-university/tertiary | 10.0, 9.8 (2.8) | |||
| Current activity | ||||
| Total close up work activity | ||||
| = 9 hours per day | 10.0, 9.9 (2.8) | 0.71 | ||
| > 9 hours per day | 10.0, 9.9 (2.9) | |||