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Table 2 Descriptive information on cohort of people with at least one hospitalization after COPD hospitalization (N = 520)

From: Effect measure modification of the association between short-term exposures to PM2.5 and hospitalizations by long-term PM2.5 exposure among a cohort of people with Chronic Obstructive Pulmonary Disease (COPD) in North Carolina, 2002–2015

Characteristic

Total

N (%)

Highera annual PM2.5 N (%)

Lowera annual PM2.5 N (%)

N

N = 520

263

257

Sex

 Male

229 (44.04)

121 (46.01)

108 (42.02)

 Female

290 (55.77)

141 (53.61)

149 (57.98)

Race

 Black

135 (25.96)

78 (29.66)

57 (22.18)

 White

371 (71.35)

176 (66.92)

195 (75.88)

 Other

14 (2.69)

9 (3.42)

5 (1.94)

 Deceased by end of follow up

255 (49.13)

150 (57.25)

105 (40.86)

Average age at first visit

65 years

64 years

66 years

  1. aabove and below median concentration
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Environmental Health

ISSN: 1476-069X