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Table 1 Demographic characteristics of patients with acute kidney injury who visited the emergency department

From: Temperature as a risk factor of emergency department visits for acute kidney injury: a case-crossover study in Seoul, South Korea

Characteristics No. of subjects (%) χ 2 p-value
Total   21,656 (100)  
Sex Male 12,465 (57.56) 494.97 < 0.0001
Female 9191 (42.44)  
Age (years) < 65 8140 (37.59) 1334.6 < 0.0001
≥ 65 13,516 (62.41)  
Season Warm 10,861 (50.15) 0.2 0.6538
Cool 10,795 (49.85)  
Comorbidities AKI with coexisting hypertension 5245 (24.22)
AKI with coexisting diabetes 3508 (16.20)