Table 1.
Maternal and child characteristics in the Northern Sweden Maternity Cohort
| Characteristic | Cases (n = 223) | Controls (n = 417) |
|---|---|---|
| Age at blood collection (years) | 26.5 (17–39) | 26.5 (17–39) |
| Gestational age at blood collection (days) | 72 (36–116) | 70 (37–120) |
| Children at diagnosis/selection as control | ||
| 1 | 55 (25%) | 78 (19%) |
| 2 | 120 (54%) | 209 (50%) |
| 3 | 48 (22%) | 130 (31%) |
| Number of pregnancies at blood collectiona | ||
| 1 | 182 (82%) | 327 (78%) |
| 2 | 35 (16%) | 75 (18%) |
| 3 | 6 (3%) | 15 (4%) |
| Maternal weightb (kg) | 61 (39–89) | 60 (37–127) |
| Maternal heightc (cm) | 165 (147–183) | 165 (144–180) |
| Current smoker | 73 (33%) | 121 (29%) |
| Child weight (g) | 3470 (2300–4680) | 3450 (2115–4770) |
| Case characteristics | ||
| Age at diagnosis (years) | 46.7 (25.5–63.8) | |
| Lag-time (years) | 19.8 (2.7–30.5) | |
| Tumor characteristics | ||
| ER status | ||
| Positive | 171 (77%) | |
| Negative | 52 (23%) | |
| PR status | ||
| Positive | 157 (70%) | |
| Negative | 66 (30%) | |
| AR statusd | ||
| Positive | 77 (84%) | |
| Negative | 15 (16%) | |
Data presented as median (range) or n (%)
AR androgen receptor, ER estrogen receptor, PR progesterone receptor
aNumber of pregnancies includes induced and spontaneous abortions
bMaternal weight missing for four cases
cMaternal height missing for 10 cases and 19 controls
dAR status available for 41% of cases