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. Author manuscript; available in PMC: 2013 Apr 17.
Published in final edited form as: Environ Sci Technol. 2012 Mar 29;46(8):4624–4632. doi: 10.1021/es204415a

Table 2.

Odds of an endometriosis diagnosis by urinary concentrations of BP derivatives and cohort (ENDO Study)

BP analyte Operative cohort (n=473)
Population cohort (n=127)
(quarter ng/mL) OR c (95% CI) OR d (95% CI) OR c (95% CI) OR d (95% CI)
2OH-4MeO-BP
 1st quartile (<0.28-2.43) reference reference reference reference
 2nd quartile (2.44-5.99) 0.80 (0.47, 1.34) 0.82 (0.48, 1.38) 0.96 (0.12, 7.38) 0.89 (0.11, 7.25)
 3rd quartile (6.00-36.69) 0.96 (0.58, 1.61) 0.99 (0.59, 1.67) 1.92 (0.34, 10.8) 2.36 (0.39, 14.2)
 4th quartile (36.70-5890) 1.12 (0.67, 1.88) 1.24 (0.73, 2.10) 1.64 (0.29, 9.19) 1.67 (0.28, 10.1)
 Trend test a 1.05 (0.89, 1.24) 1.08 (0.92, 1.28) 1.22 (0.73, 2.06) 1.25 (0.73, 2.15)
 >Q3 versus <Q3 b 1.22 (0.79, 1.87) 1.33 (0.85, 2.06) 1.22 (0.38, 3.91) 1.17 (0.34, 3.94)
2,4OH-BP
 1st quartile (<0.082-1.68) reference reference reference reference
 2nd quartile (1.69-5.65) 0.77 (0.45, 1.31) 0.76 (0.44, 1.31) 0.44 (0.07, 2.89) 0.48 (0.07, 3.40)
 3rd quartile (5.66-26.59) 1.14 (0.68, 1.92) 1.16 (0.68, 1.97) 0.63 (0.13, 3.13) 0.73 (0.14, 3.97)
 4th quartile (26.60-3200) 1.43 (0.87, 2.35) 1.59 (0.94, 2.66) 0.86 (0.18, 4.03) 0.89 (0.17, 4.61)
 Trend test a 1.15 (0.98, 1.35) 1.19 (1.01, 1.41) 1.02 (0.60, 1.74) 1.03 (0.60, 1.79)
 >Q3 versus <Q3 b 1.48 (0.98, 2.25) 1.65 (1.07, 2.53) 1.33 (0.41, 4.27) 1.25 (0.37, 4.24)
4OH-BP
 1st quartile (<0.082-0.17) reference reference reference reference
 2nd quartile (0.18-0.35) 0.87 (0.52, 1.45) 0.92 (0.55, 1.54) 1.08 (0.20, 5.85) 1.51 (0.25, 9.20)
 3rd quartile (0.36-0.71) 1.02 (0.61, 1.71) 1.03 (0.62, 1.73) 1.24 (0.25, 6.06) 2.20 (0.38, 12.7)
 4th quartile (0.71-22.40) 0.84 (0.49, 1.42) 0.87 (0.51, 1.48) 1.16 (0.24, 5.66) 1.69 (0.31, 9.21)
 Trend test a 0.97 (0.82, 1.14) 0.97 (0.82, 1.15) 1.06 (0.65, 1.73) 1.19 (0.71, 1.98)
 >Q3 versus <Q3 b 0.87 (0.56, 1.36) 0.89 (0.57, 1.38) 1.05 (0.31, 3.58) 1.12 (0.31, 4.01)

NOTE: Logistic regression models for the operative cohort include 190 women with and 283 without endometriosis, and 14 and 113 women with and without endometriosis, respectively, in the population cohort.

a

Trend test assessed linear trends of BP derivatives across the four intervals defined by the 25th, 50th, and 75th percentiles.

b

Women in the highest quartile for each BP derivative were compared with women in the combined first three quartiles.

c

Odds ratios from unadjusted logistic regressions

d

Odds ratios from multivariable logistic regressions adjusting for site (Utah, California) and hair color (red, blonde, brown/black)