Air Pollution from Industrial Swine Operations and Blood Pressure of Neighboring Residents

http://dx.doi.org/10.1289/ehp.1205109



Table 4. Linear fixed effects beta coefficients (SEs) and t-values for potential modifiers of associations of BP with one-unit increases in hog odor and H2S, adjusted for time-of-day (AM or PM), Community Health Effects of Industrial Hog Operations study.
Modifier SBP DBP
β (SE) t-Value β (SE) t-Value
Hog odor (0–8)        
Age ≤ 53.7 years 0.04 (0.18) 0.23 0.08 (0.12) 0.68
Age > 53.7 years 0.14 (0.15) 0.93 0.33 (0.10) 3.34
Women 0.07 (0.13) 0.50 0.19 (0.09) 2.11
Men 0.20 (0.23) 0.85 0.36 (0.15) 2.37
Butanol threshold ≤ 40 ppm 0.10 (0.15) 0.67 0.21 (0.10) 2.17
Butanol threshold > 40 ppm 0.10 (0.19) 0.54 0.24 (0.12) 2.03
JHAC score ≤ 52 0.18 (0.17) 1.07 0.22 (0.11) 2.05
JHAC score > 52 0.01 (0.16) 0.06 0.20 (0.11) 1.92
No BP meds 0.19 (0.16) 1.17 0.25 (0.11) 2.31
Any BP meds 0.01 (0.17) 0.04 0.21 (0.11) 1.96
H2S (ppb)        
Age ≤ 53.7 years 0.30 (0.15) 1.97 0.13 (0.10) 1.32
Age > 53.7 years 0.28 (0.19) 1.45 0.10 (0.12) 0.78
Women 0.24 (0.13) 1.85 0.05 (0.08) 0.58
Men 0.56 (0.30) 1.90 0.48 (0.19) 2.51
Butanol threshold ≤ 40 ppm 0.17 (0.22) 0.78 0.07 (0.14) 0.48
Butanol threshold > 40 ppm 0.33 (0.14) 2.40 0.13 (0.09) 1.49
JHAC score ≤ 52 0.36 (0.14) 2.67 0.17 (0.09) 1.90
JHAC score > 52 0.02 (0.24) 0.08 –0.07 (0.15) –0.45
No BP medication 0.38 (0.14) 2.70 0.10 (0.09) 1.12
Any BP medication 0.07 (0.22) 0.34 0.15 (0.14) 1.07