Skip to main content

Table 1 Maternal and child characteristics in the Northern Sweden Maternity Cohort

From: Early pregnancy sex steroids during primiparous pregnancies and maternal breast cancer: a nested case–control study 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%)

  1. Data presented as median (range) or n (%)
  2. AR androgen receptor, ER estrogen receptor, PR progesterone receptor
  3. aNumber of pregnancies includes induced and spontaneous abortions
  4. bMaternal weight missing for four cases
  5. cMaternal height missing for 10 cases and 19 controls
  6. dAR status available for 41% of cases