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Table 1 Demographic Characteristics of Hospitalizations for Asthma in Maryland: 2000 to 2012

From: Exposure to extreme heat and precipitation events associated with increased risk of hospitalization for asthma in Maryland, U.S.A.

  Hospitalizations-No. (%)  
  Segmented by Seasona  
Characteristic Winter
(n = 30,436)
Spring
(n = 31,103)
Summer
(n = 20,776)
Autumn
(n = 33,608)
Total
(n = 115,923)
Genderb
 Female 19,326 (64) 18,954 (61) 13,081 (63) 19,334 (58) 70,695 (61)
 Male 11,110 (36) 12,148 (39) 7,695 (37) 14,273 (42) 45,226 (39)
Age at hospitalization, median (IQR), yrsc 47 (20–62) 44 (12–60) 47 (27–61) 37 (7–55) 44 (12–60)
Age Groupd
 ≤4 4,397 (15) 4,841 (16) 2,663 (13) 6,142 (18) 18,043 (16)
 5 to 17 3,350 (11) 4,669 (15) 1,846 (9) 6,784 (20) 16,649 (14)
 18 to 64 16,256 (53) 15,400 (50) 11,993 (58) 15,813 (47) 59,462 (51)
 ≥65 6,433 (21) 6,192 (20) 4,274 (21) 4,869 (15) 21,768 (19)
Race/Ethnicity
 Non-Hispanic White 13,320 (44) 12,930 (42) 8,132 (39) 12,769 (38) 47,151 (41)
 Non-Hispanic Black 14,513 (48) 15,296 (49) 10,913 (53) 17,625 (52) 58,347 (50)
 Hispanic 754 (3) 879 (3) 446 (2) 968 (3) 3,047 (3)
 Other 860 (3) 957 (3) 545 (3) 1,117 (3) 3,479 (3)
 Unknown 989 (3) 1,041 (3) 740 (4) 1,129 (3) 3,899 (3)
  1. Abbreviations: IQR Interquartile Range, yrs years
  2. aSeasons are winter (December-February), spring (March-May), summer (June-August), and autumn (September-November)
  3. bUnknown (n = 1) for spring season; unknown (n = 1) for autumn season
  4. c2,604 age observations were excluded due to age <1 year old, and were thus unknown
  5. dUnknown (n = 1) for spring season