Ulcerative Colitis and Perfluorooctanoic Acid (PFOA) in a Highly Exposed Population of Community Residents and Workers in the Mid-Ohio Valley

http://dx.doi.org/10.1289/ehp.1206449



Table 4. Prospective survival analysis results, follow-up 2005–2006 through 2008–2011, for selected outcomes (≥ 30 cases) [RR (95%)].
  Q2 vs. Q1 Q3 vs. Q1 Q4 vs. Q1 ptrend of log cumulative exposure
Q, quartile.
Unlagged exposure        
Ulcerative colitis 1.68 (0.62, 4.66) 2.10 (0.75, 5.85) 1.62 (0.57, 4.61) 0.21
Rheumatoid arthritis 0.81 (0.39, 1.68) 2.07 (1.00, 4.27) 0.52 (0.25, 1.09) 0.89
10-year lagged exposure        
Ulcerative colitis 1.21 (0.43, 3.34) 2.16 (0.80, 5.81) 1.51 (0.43, 4.30) 0.12
Rheumatoid arthritis 0.31 (0.14, 0.71) 0.90 (0.41, 2.00) 0.32 (0.14, 0.72) 0.89