Risk of Ischemic Stroke, Hemorrhagic Stroke, and All-Cause Mortality in Retinal Vein Occlusion: A Nationwide Population-Based Cohort Study

Table 3

Comparison of the risk for the clinical outcomes between the RVO and PS-matched comparison groups, stratified by age subgropus.

Clinical outcome	Age < 50		50 ≤ age < 60		60 ≤ age < 70		Age ≥ 70
	n = 23382		n = 34000		n = 36935		n = 43197
	ID	HR	ID	HR	ID	HR	ID	HR
Stroke
RVO	201.7	1.73 (1.56–1.93)	381.1	1.64 (1.53–1.75)	542.2	1.39 (1.32–1.47)	770.1	1.17 (1.12–1.23)
comparison	116.5	Reference	232.9	Reference	390.0	Reference	656.0	Reference
Ischemic stroke
RVO	168.1	1.67 (1.49–1.88)	331.9	1.58 (1.47–1.69)	483.4	1.39 (1.32–1.48)	659.7	1.18 (1.12–1.24)
Comparison	100.6	Reference	210.6	Reference	346.9	Reference	559.8	Reference
Hemorrhagic stroke
RVO	40.6	1.57 (1.25–1.99)	53.3	1.54 (1.30–1.82)	63	1.41 (1.22–1.63)	82.7	1.23 (1.09–1.40)
Comparison	25.8	Reference	34.7	Reference	44.7	Reference	67.2	Reference
All-cause mortality
RVO	2	1.03 (0.89–1.19)	115.4	1.02 (0.92–1.14)	189.1	1.02 (0.94–1.10)	469.6	1.03 (0.98–1.09)
Comparison	85.7	Reference	113.1	Reference	186.2	Reference	455.5	Reference

ID = incidence density; HR = hazard ratio; the unit of Incidence density: per 10000-year.