Table 4.

Incidence rates and hazard ratios for myopia in children with allergic conjunctivitis (AC) compared with children without AC stratified by follow-up years in Cox proportional hazard regression.

Follow-up years	Non-AC group			AC group			aHRa (95% CI)
	Event no.	Person-years	IR	Event no.	Person-years	IR
1–2	957	114,988	8.32	3224	110,770	29.1	3.43 (3.20–3.69)⁎⁎⁎
2–3	2670	109,112	24.5	5586	98,345	56.8	2.32 (2.22–2.43)⁎⁎⁎
4–5	2576	100,540	25.6	5015	84,662	59.2	2.33 (2.22–2.44)⁎⁎⁎
≥ 6	3174	230,262	13.8	4588	175,761	26.1	1.92 (1.83–2.01)⁎⁎⁎

Abbreviation: AC, allergic conjunctivitis; IR, incidence rates, per 1000 person-years; aHR, adjusted hazard ratio; CI, confidence interval.

^aModels adjusted for sex, age (continuous), parents' occupational status, and urbanization.

^⁎⁎⁎p < 0.001.