Table 3 Negative binomial regression analyses of asthma and LRI ED visit and hospitalization rates and factors

 Lower SES

1.35 (1.26–1.46)***

1.47 (1.30–1.67)***

1.11 (1.09–1.13)***

1.44 (1.33–1.56)***

 Increased air pollution

1.33 (1.24–1.42)***

1.16 (1.03–1.31)*

1.03 (1.02–1.04)***

1.16 (1.08–1.25)***

 Mobile homes (%)

1.03 (0.99–1.07)

1.10 (1.03–1.17)**

1.05 (1.03–1.07)***

1.10 (1.06–1.15)***

 Attached homes (%)

1.09 (1.05–1.13)***

1.03 (0.97–1.10)

1.07 (1.05–1.09)***

1.05 (1.01–1.10)**

 Home gas heating (%)

0.89 (0.83–0.95)***

1.16 (1.02–1.32)*

0.99 (0.96–1.03)

1.14 (1.05–1.23)**

 Lacking complete plumbing (%)

1.06 (0.99–1.12)

1.16 (1.05–1.29)**

1.07 (1.03–1.10)***

1.20 (1.12–1.29)***

 Built before 1940 (%)

1.12 (1.08–1.17)***

1.05 (0.98–1.14)

1.09 (1.06–1.11)***

1.11 (1.06–1.17)***

  > 1 person per room (%)

1.21 (1.15–1.26)***

1.25 (1.16–1.34)***

1.12 (1.10–1.14)***

1.22 (1.17–1.28)***

 Population density (persons/sq. mile)

1.20 (1.12–1.30)***

0.91 (0.80–1.04)

1.05 (1.01–1.08)*

0.80 (0.73–0.87)***

 In Pima County

  (Ref: Maricopa County)

0.66 (0.54–0.80)***

0.83 (0.60–1.14)

0.92 (0.85–1.01)

0.80 (0.66–0.98)*

 Lower SES

1.15 (0.99–1.33)

1.57 (1.24–1.97)***

1.21 (1.13–1.28)***

1.52 (1.32–1.76)***

 Increased air pollution

1.05 (0.93–1.19)

0.87 (0.72–1.05)

1.12 (1.06–1.19)***

0.90 (0.79–1.01)

 Mobile homes (%)

1.01 (0.97–1.05)

1.03 (0.97–1.10)

1.03 (1.01–1.05)**

1.04 (1.01–1.08)*

 Attached homes (%)

1.01 (0.96–1.05)

1.02 (0.95–1.09)

1.04 (1.02–1.06)***

1.04 (1.00–1.08)

 Home gas heating (%)

0.91 (0.84–0.98)**

1.18 (1.03–1.35)*

0.98 (0.95–1.02)

1.11 (1.03–1.2)**

 Lacking complete plumbing (%)

1.02 (0.96–1.08)

1.07 (0.97–1.19)

1.01 (0.98–1.04)

1.09 (1.02–1.16)*

 Built before 1940 (%)

1.07 (1.02–1.13)**

0.93 (0.86–1.01)

1.02 (0.99–1.04)

0.97 (0.92–1.02)

  > 1 person per room (%)

1.06 (0.97–1.15)

1.07 (0.94–1.22)

0.99 (0.96–1.02)

1.05 (0.97–1.13)

 Population density (persons/sq. mile)

1.01 (0.88–1.15)

0.55 (0.45–0.67)***

0.94 (0.89–1.00)*

0.50 (0.45–0.57)***

 In Pima County

  (Ref: Maricopa County)

0.77 (0.59–1.01)

0.47 (0.31–0.73)***

1.07 (0.95–1.21)

0.48 (0.38–0.62)***