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Table 1 Background information of non-smoking and smoking pregnant women aged <35 years and ≥35 years old

From: Smoking among older childbearing women - a marker of risky health behaviour a registry-based study in Finland

 

<35y non-smoker

Smoker

P

≥35y non-smoker

Smoker

P

Maternal diabetes (N/%)

15834 (3.4)

2471 (3.6)

<.056

6535 (6.0)

715 (6.3)

<.129

Pregravid BMI >25 kg/m2 (N/%)

49107 (29.4)

8049 (35.0)

<.001

14483 (37.1)

1529 (45.2)

<.001

Placenta previa (N/%)

935 (0.2)

158 (0.2)

<.162

457 (0.4)

44 (0.4)

<.657

Late pregnancy bleeding (N/%)

6578 (1.4)

1141 (1.7)

<.001

1826 (1.7)

250 (2.2)

<.001

Anemia (N/%)

3327 (0.7)

579 (0.8)

<.001

855 (0.8)

68 (0.6)

<.037

Unmarried (N/%)

156358 (34.0)

43740(63.4)

<.001

30367(27.8)

5829 (51.7)

<.001

Fertility treatment other than IVF (N/%)

6233 (1.4)

348 (0.5)

<.001

3264 (3.0)

139 (1.2)

<.001

IVF (N/%)

5753 (1.2)

297 (0.4)

<.001

3553 (3.3)

141 (1.3)

<.001

Preeclampsia (N/%)

21954(4.8)

2400(3.5)

<.001

6400(5.9)

535(4.7)

<.001