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Table 1 Description of the study population

From: Abnormal birth weights for gestational age in relation to maternal characteristics in Sweden: a five year cross-sectional study

Variables & Categories

n

%

Birth Outcomes

  

 Birth weight

5089

 

  > 4000 g

957

18.8%

  2500–4000 g

3992

78.4%

  < 2500 g

140

2.8%

 Size for gestational age

5089

 

  LGA

141

2.8%

  AGA

4865

95.6%

  SGA

83

1.6%

 Sex of child

5089

 

  Male

2605

51.2%

  Female

2484

48.8%

Maternal general characteristics

  

 Age at pregnancy

5089

 

  < 20

44

0.9%

  20–35

4416

86.8%

  35+

629

12.4%

 Parity

5089

 

  Primiparity

2263

44.5%

  Multiparity

2781

54.6%

  Grand multiparity

45

0.9%

 BMI category

4654

 

  Underweight (BMI < 18.5)

187

4.0%

  Normal weight (BMI 18.5–24.9)

3132

67.3%

  Overweight (BMI 25–29.9)

915

19.7%

  Obese (BMI ≥ 30)

420

9.0%

 Gestational age at delivery

5089

 

  Preterm (< 37 week)

218

4.3%

  Term (37–42 week)

4480

88.0%

  Post-term > 42week)

391

7.7%

Lifestyle characteristics

  

 Smoking at ANC enrolment

5066

 

  No

4991

98.5%

  Yes

75

1.5%

 Snuffing tobacco at ANC enrolment

5066

 

  No

4872

96.2%

  Yes

194

3.8%

 Alcohol consumption (AUDIT score) within 12 months before pregnancy

5074

 

  No risk

4722

93.1%

  Risky drinker

352

6.9%

 Physical activity within 12 months before pregnancy

4985

 

  Active (≥ 150 min/week)

3185

63.9%

  Inactive (< 150 min/week)

1800

36.1%

Socioeconomic characteristics

  

 Education

4999

 

  High education > 12 yrs

3083

61.7%

  Medium and low education ≤ 12 yrs

1916

38.3%

 Employment

4864

 

  Employed

4192

86.2%

  Unemployed

672

13.8%

  1. Note: AUDIT - Alcohol Use Disorders Identification Test, Note: LGA- large for gestational age, AGA - average for gestational age, SGA- small for gestational age