An epidemiological survey of prevalence of stroke in urban and rural workers of Lhasa region

Abstract

Objective To describe the prevalence,clinical subtypes and associated risk factors of stroke in urban and rural workers from Lhasa,Tibet,and provide the evidence of prevention and treatment.Methods A retrospective,population-based descriptive analysis of 81298 urban and rural workers in the Cities Staff Medical Insurance Registry was performed; stroke and myocardial infarction were defined by the International Classification of Disease(ICD)-10 coded from hospital records; the prevalence of these 2 dieases were compared,and clinical subtypes and associated risk factors of stroke in these stroke patients were analyzed.Results Stroke patients(n=165)were included in the study with a prevalence of 202.96/100,000(95％CI:170.14-231.32),and this number was significantly larger than that of patients with myocardial infarction(n=14),enjoying a prevalence of 17/100,000.The most common subtype was cerebral infarction,followed by cerebral hemorrhage and subaraclnoid hemorrhage; the prevalence of stroke was significantly different in patients with different ages(ranged from 30 to 89,P＜0.05),and the older of the population,the higher prevalence of the stroke; male population had an obviously higher prevalence of stroke than female population,and the population from Han nationality had an obviously higher prevalence of stroke than population from Tibetan nationality (P＜0.05).Conclusion Stroke is the primary fatal disease for the elderly population from Lhasa,and the primary subtype of stroke is cerebral ischemia; its associated risk factors include age,gender and nationality; and combined hypertension is the main risk factor. Key words: Lhasa; Stroke; Prevalence