Table 3.
Incidence rates and hazard ratios of myopia in children with allergic conjunctivitis (AC) compared with children without AC stratified by frequency of medical visits for AC in Cox proportional hazard regression.
| Average frequency for medical visits, per year | N | Event no. | Person-years | IR | aHRa (95% CI) |
|---|---|---|---|---|---|
| Non-AC group | 58,747 | 10,474 | 554,903 | 18.9 | 1.00 |
| AC group | |||||
| < 1 | 39,282 | 10,030 | 358,670 | 28.0 | 1.46 (1.42–1.50)⁎⁎⁎ |
| 1–2 | 10,988 | 5247 | 76,255 | 68.8 | 3.52 (3.40–3.64)⁎⁎⁎ |
| > 2 | 8477 | 6008 | 34,612 | 174 | 8.90 (8.62–9.19)⁎⁎⁎ |
| p for trend | < 0.001 |
Abbreviation: AC, allergic conjunctivitis; IR, incidence rates, per 1000 person-years; aHR, adjusted hazard ratio; CI, confidence interval.
a
Model adjusted for sex, age (continuous), parents' occupational status, and urbanization.
⁎⁎⁎
p < 0.001.