Table 4 Adjusteda odds ratios or percent differences of specific gravity-corrected urinary organophosphate ester metabolite concentrations
Characteristics | BCIPP OR (95% CI) | BDCIPP % diff (95% CI) | DPHP % diff (95% CI) | ip-PPP % diff (95% CI) | tb-PPP % diff (95% CI) |
|---|---|---|---|---|---|
Sociodemographic | |||||
 Maternal age (years; centered) | 1.02 (0.95, 1.10) | −4.48 (−7.98, −0.85) | −0.29 (−3.18, 2.69) | −1.17 (− 3.47, 1.18) | 1.08 (− 4.82, 7.34) |
 Maternal BMI (kg/m2) | 0.99 (0.96, 1.03) | 3.34 (1.33, 5.39) | 0.39 (−1.74, 2.55) | 1.25 (− 0.29, 2.81) | 1.53 (−3.03, 6.31) |
Maternal race/ethnicity | |||||
 White, n = 48 | 1 (ref) | 0 (ref) | 0 (ref) | 0 (ref) | 0 (ref) |
 Non-white, n = 42 | 1.43 (0.65, 3.16) | 22.5 (−21.5, 91.3) | −28.0 (−52.6, 9.20) | 4.58 (− 23.4, 42.8) | −12.0 (−57.2, 81.0) |
Maternal education (highest level) | |||||
 High school diploma or less, n = 18 | 1 (ref) | 0 (ref) | 0 (ref) | 0 (ref) | 0 (ref) |
 Less than Bachelor’s degree, n = 18 | 0.91 (0.31, 2.66) | 13.4 (−35.4, 98.9) | 47.0 (−9.81, 139.6) | 19.8 (25.3, 92.0) | 331.9 (60.9, 1059.5) |
 Bachelor’s degree or higher, n = 54 | 1.22 (0.42, 3.57) | 48.9 (−20.9, 180.3) | 19.8 (−28.4, 100.5) | 63.1 (5.48, 152.1) | 81.3 (−46.8, 518.1) |
Parity | |||||
 Nulliparous, n = 44 | 1 (ref) | 0 (ref) | 0 (ref) | 0 (ref) | 0 (ref) |
 Parous, n = 46 | 0.53 (0.26, 1.10) | 31.0 (−11.2, 93.1) | 29.8 (−8.88, 85.0) | 37.2 (3.74, 81.4) | −7.91 (− 54.8, 87.5) |
Trimester | |||||
 First (<  13 weeks), n = 27b | 1 (ref) | 0 (ref) | 0 (ref) | 0 (ref) | 0 (ref) |
 Second (13–27 weeks), n = 133 | 0.80 (0.32, 2.01) | 1.14 (− 30.5, 47.2) | 86.9 (25.0, 179.6) | 3.26 (−23.0, 38.6) | − 41.9 (− 74.3, 31.5) |
 Third (28 weeks to delivery), n = 52 | 0.45 (0.14, 1.45) | −10.8 (− 40.2, 32.8) | 108.8 (33.5, 226.7) | − 12.7 (− 40.1, 27.4) | 12.1 (−51.0, 156.5) |
Time at collection (hours) | |||||
 Before 11 am, n = 74b | 1 (ref) | 0 (ref) | 0 (ref) | 0 (ref) | 0 (ref) |
 Between 11 am and 1:59 pm, n = 79 | 0.71 (0.35, 1.44) | 1.05 (−24.9, 36.0) | −2.57 (− 27.1, 30.3) | −7.31 (− 27.7, 18.7) | −36.6 (−64.2, 12.1) |
 At or after 2 pm, n = 59 | 0.59 (0.25, 1.39) | −38.0 (−56.1, − 12.3) | −25.1 (−44.7, 1.44) | −36.7 (− 51.1, − 18.0) | −29.8 (−63.6, 35.1) |
Season of sample collection | |||||
 Fall, n = 52b | 1 (ref) | 0 (ref) | 0 (ref) | 0 (ref) | 0 (ref) |
 Winter, n = 85 | 0.64 (0.27, 1.52) | − 24.4 (−44.1, 2.14) | − 17.4 (− 39.8, 13.4) | − 30.3 (−49.8, − 3.38) | −33.9 (−66.7, 31.2) |
 Spring, n = 57 | 0.47 (0.17, 1.29) | 4.87 (− 28.3, 53.3) | − 11.2 (− 40.7, 33.1) | 4.33 (− 25.4, 45.8) | 32.2 (− 41.4, 198.2) |
 Summer, n = 18 | 0.45 (0.15, 1.31) | 7.37 (−42.8, 101.5) | 22.1 (− 32.0, 119.1) | 9.47 (−22.6, 54.9) | − 15.1 (−68.4, 128.5) |
Coefficient of determination (R2) | |||||
 Sociodemographic only | 10.1 | 27.4 | 11.1 | 12.9 | 12.4 |
Environmental/Behavioral | |||||
 Frequency of vacuuming home | |||||
  Never/yearly, n = 17 |  | 0 (ref) |  |  |  |
  Monthly, n = 18 |  | −58.6 (−77.4, −24.0) |  |  |  |
  Daily/weekly, n = 55 |  | −47.8 (−68.6, −13.3) |  |  |  |
 Frequency of mopping home | |||||
  Never/yearly, n = 19 |  | 0 (ref) | 0 (ref) | 0 (ref) | 0 (ref) |
  Monthly, n = 25 |  | −1.04 (−34.5, 49.4) | 24.2 (−21.2, 95.7) | −23.8 (−43.0, 1.93) | 38.7 (−42.1, 232.2) |
  Daily/weekly, n = 46 |  | 41.7 (− 16.8, 141.0) | 20.8 (−21.1, 85.1) | 18.2 (− 18.0, 70.3) | 23.1 (−52.2, 216.7) |
 New furniture (within past year) | |||||
  No, n = 68 - 71c | 1 (ref) |  | 0 (ref) |  |  |
  Yes, n = 19–22 | 0.67 (0.29, 1.55) |  | 31.0 (−9.6, 89.8) |  |  |
 New bedding (within past year) | |||||
  No, n = 52 - 54c | 1 (ref) |  |  | 0 (ref) |  |
  Yes, n = 36–38 | 0.49 (0.23, 1.04) |  |  | −23.3 (−41.8, 1.07) |  |
 # of televisions in household | |||||
   < 2, n = 26 |  | 0 (ref) |  |  |  |
   2+, n = 64 |  | 19.4 (−31.4, 107.6) |  |  |  |
 # of computers or tablets in household | |||||
   < 2, n = 16 |  | 0 (ref) | 0 (ref) |  | 0 (ref) |
   2+, n = 74 |  | 15.6 (−31.4, 94.7) | −26.6 (−54.5, 18.3) |  | −33.5 (−75.1, 77.5) |
Coefficient of determination (R2) | |||||
 Sociodemographic + |  |  |  |  |  |
 Environmental/behavioral | 14.0 | 36.8 | 13.3 | 17.4 | 13.5 |