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Table 3 Odds ratios (ORs) and 95% confidence intervals (CIs) for non-traumatic mortality for lag day 0 and lag day 1

From: Mortality associated with wildfire smoke exposure in Washington state, 2006–2017: a case-crossover study

CategoryLag Day 0: Adjusted OR (95% CI)Lag Day 1: Adjusted OR (95% CI)N (%) with exposure contrasta
All non-traumatic1.01 (0.99, 1.04)1.02 (1.00, 1.05)31,719 (100)
Underlying cause of death
 Cardiovascular0.99 (0.94, 1.04)1.02 (0.97, 1.07)8135 (25.6)
  Ischemic heart disease1.04 (0.93, 1.17)1.00 (0.89, 1.13)1482 (4.7)
 Respiratory1.09 (1.00, 1.18)1.05 (0.97, 1.15)2945 (9.3)
  Asthma0.51 (0.23, 1.12)0.65 (0.31, 1.35)46 (0.1)
  COPD1.14 (1.02, 1.26)*1.07 (0.96, 1.20)1732 (5.5)
  Pneumonia1.08 (0.86, 1.36)0.97 (0.77, 1.22)380 (1.2)
 Cerebrovascular0.90 (0.75, 1.07)0.88 (0.74, 1.05)710 (2.2)
Age group (years)
 0–40.97 (0.77, 1.22)0.90 (0.71, 1.13)423 (1.3)
 5–140.95 (0.64, 1.41)0.83 (0.54, 1.27)140 (0.4)
 15–440.99 (0.85, 1.15)0.98 (0.85, 1.14)935 (2.9)
 45–641.00 (0.95, 1.06)1.01 (0.95, 1.07)6082 (19.2)
 65–841.02 (0.98, 1.06)1.03 (0.99, 1.07)13,723 (43.3)
 85+1.00 (0.96, 1.05)1.03 (0.98, 1.08)10,416 (32.8)
Location
 Non-urban1.00 (0.96, 1.03)1.01 (0.97, 1.05)17,770 (56.0)
 Urban1.02 (0.99,1.06)1.03 (1.00, 1.07)13,949 (44.0)
Median household incomeb
 < $35,0000.99 (0.92, 1.07)0.99 (0.92, 1.07)3668 (11.6)
 $35,000 - $50,0001.05 (0.99, 1.10)1.07 (1.02, 1.13)*7921 (25.0)
 $50,000 - $75,0001.00 (0.96, 1.04)1.00 (0.96, 1.05)11,037 (34.8)
 $75,000 - $100,0001.03 (0.96, 1.10)1.07 (1.00, 1.15)*4579 (14.4)
 ≥ $100,0000.98 (0.87, 1,11)0.90 (0.80, 1.02)1443 (4.5)
Race
 White1.01 (0.99, 1.04)1.03 (1.00, 1.06)*28,395 (89.5)
 Black1.04 (0.89, 1.21)0.99 (0.85, 1.16)885 (2.8)
 Native American0.95 (0.77, 1.17)0.79 (0.64, 0.98)*472 (1.5)
 Hispanic0.81 (0.67, 0.99)*0.91 (0.76, 1.10)580 (1.8)
 Native Hawaiian/ Other Pacific Islander1.19 (0.93, 1.52)1.04 (0.80, 1.34)329 (1.0)
 Asian0.98 (0.84, 1.14)0.99 (0.85, 1.15)943 (3.0)
Sex
 Female1.00 (0.96, 1.03)1.03 (0.99, 1.06)15,946 (50.3)
 Male1.03 (0.99, 1.06)1.02 (0.98, 1.05)15,772 (49.7)
  1. *p ≤ 0.05
  2. aPercent of cases, out of all cases whose strata have both wildfire smoke days and non-wildfire smoke days
  3. bAnnual median household income estimates at the census tract level