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Table 1 Characteristics of hospital admissions for respiratory diseases in Shanghai, China from January 1, 2008 to July 31, 2020

From: Effects of particulate matter on hospital admissions for respiratory diseases: an ecological study based on 12.5 years of time series data in Shanghai

Characteristics n (%)
Admissions of total respiratory diseases 1,960,361 (100.00)
 COPD 665,541 (33.95)
 Asthma 33,329 (1.70)
 Pneumonia 455,718 (23.25)
Gender
 Male 1,091,645 (55.69)
 Female 868,714 (44.31)
 Missing 2 (0.00)
Age groups, years
  < 45 201,952 (10.30)
 45– 410,273 (20.93)
 65– 370,846 (18.92)
 75– 977,289 (49.85)
 Missing 1 (0.00)
Season
 Cold 885,737 (45.18)
 Warm 1,074,624 (54.82)