Table 4.

Unadjusted and adjusted HRs of 1-year mortality for each race/ethnicity group

Number of StationsWhiteBlackHispanic
HR (95% CI)P (versus Reference)HR (95% CI)P (versus Reference)HR (95% CI)P (versus Reference)
Unadjusted results
 1–51.36 (1.02 to 1.81)0.042.58 (1.96 to 3.39)<0.0011.82 (1.13 to 2.94)0.02
 6–101.09 (1.03 to 1.16)0.0051.55 (1.36 to 1.76)<0.0011.35 (1.09 to 1.66)0.006
 11–151.01 (0.97 to 1.05)0.701.18 (1.09 to 1.27)<0.0011.08 (0.95 to 1.23)0.24
 16–201.01 (0.97 to 1.05)0.621.11 (1.05 to 1.18)<0.0011.10 (1.00 to 1.22)0.05
 21–251.01 (0.97 to 1.06)0.531.14 (1.08 to 1.22)<0.0011.01 (0.91 to 1.11)0.90
 26–301 (reference)1 (reference)1 (reference)
 31–351.06 (0.99 to 1.13)0.091.06 (0.99 to 1.15)0.111.06 (0.89 to 1.27)0.51
 36–450.98 (0.90 to 1.06)0.581.04 (0.96 to 1.13)0.371.04 (0.90 to 1.20)0.64
 46–601.01 (0.90 to 1.14)0.880.97 (0.86 to 1.09)0.570.88 (0.64 to 1.22)0.44
 ≥611.07 (0.96 to 1.18)0.211.22 (1.03 to 1.44)0.020.85 (0.69 to 1.05)0.12
Adjusted resultsa
 1–51.26 (1.00 to 1.57)0.051.78 (1.35 to 2.33)<0.0011.14 (0.67 to 1.95)0.62
 6–101.10 (1.03 to 1.17)0.0031.38 (1.26 to 1.51)<0.0011.28 (1.07 to 1.53)0.008
 11–151.03 (0.98 to 1.07)0.211.13 (1.05 to 1.21)<0.0011.07 (0.96 to 1.20)0.23
 16–201.01 (0.97 to 1.05)0.611.09 (1.03 to 1.15)0.0031.06 (0.97 to 1.15)0.19
 21–251.02 (0.98 to 1.07)0.281.12 (1.05 to 1.18)<0.0010.99 (0.90 to 1.08)0.80
 26–301 (reference)1 (reference)1 (reference)
 31–351.09 (1.02 to 1.16)0.011.07 (0.99 to 1.15)0.081.12 (0.96 to 1.30)0.15
 36–450.99 (0.92 to 1.06)0.671.07 (0.99 to 1.16)0.091.08 (0.96 to 1.21)0.20
 46–601.01 (0.89 to 1.14)0.880.97 (0.86 to 1.10)0.680.93 (0.75 to 1.16)0.53
 ≥611.18 (0.93 to 1.49)0.161.17 (0.99 to 1.38)0.070.96 (0.68 to 1.35)0.80
  • a From the fully adjusted model (model 4) for each racial/ethnic group (additionally adjusted for facility zip code SES, including median household income, percentage of persons who completed high school, percentage of persons in poverty, and percentage of black population).