Table 1.
Characteristics of women in the MoBa TCS reliability substudy by TCS concentration
| Characteristics | n (%) | Women (n) with ≥1 sample with TCS > LOD |
Geometric mean of mean TCS for all 3 samples (µg/L)1,2 |
Geometric mean of meanTCS for all 3 samples (µg/g creatinine)1,2 |
|---|---|---|---|---|
| Marital status3 | ||||
| Married | 20 (46) | 9 | <LOD | <LOD |
| Cohabitated | 21 (49) | 14 | 4.5 | 4.6 |
| Single | 2 (5) | 0 | <LOD | <LOD |
| Maternal education† | ||||
| Less than high school | 4 (10) | 0 | <LOD | <LOD |
| High school | 8 (19) | 4 | <LOD | <LOD |
| Up to 4 years of college | 24 (57) | 14 | 3.4 | 3.9 |
| > 4 years of college | 6 (14) | 4 | <LOD | 3.0 |
| Maternal income (in 1000 Nok/year)3 | ||||
| <150 | 7 (17) | 2 | <LOD | <LOD |
| 150–300 | 11 (26) | 8 | <LOD | 2.8 |
| 300–400 | 17 (40) | 9 | 4.0 | 4.0 |
| >400 | 7 (17) | 5 | 4.3 | 5.7 |
| Parity | ||||
| Primiparous | 23 (51) | 19 | 5.3 | 5.8 |
| Multiparous | 22 (49) | 6 | <LOD | <LOD |
| Smoking during pregnancy3 | ||||
| None | 38 (90) | 20 | <LOD | 2.5 |
| Sometimes | 2 (5) | 2 | 19.4 | 16.9 |
| Daily | 2 (5) | 0 | <LOD | <LOD |
| Maternal age at delivery, years | ||||
| <25 | 5 (11) | 1 | <LOD | <LOD |
| 25–29 | 12 (33) | 10 | 3.7 | 4.1 |
| 30–34 | 12 (27) | 8 | 3.9 | 4.5 |
| >35 | 13 (29) | 6 | <LOD | <LOD |
| Pre-pregnancy BMI, kg/m23 | ||||
| <20 | 7 (17) | 4 | <LOD | 2.5 |
| 20–24.9 | 25 (60) | 15 | 2.7 | 3.3 |
| 25–29.9 | 6 (14) | 4 | 3.8 | 3.2 |
| ≥ 30 | 4 (9) | 0 | <LOD | <LOD |
(<LOD) indicates that the calculated GM concentration is below the LOD = 2.3 µg/L.
1
No statistically significant difference between the groups (ANOVA p>0.05)
2
GM calculations for the woman’s mean concentration based on her 3 urine sample.
3
Information missing for maternal education (n=3), marital status (n=2), maternal income (n=3), smoking during pregnancy (n=3), and pre-pregnancy BMI (n=3)