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Table 1 Baseline characteristics of the cohort and comparisons with all births in the study region

From: Risk factors and obstetric complications of large for gestational age births with adjustments for community effects: results from a new cohort study

Characteristics

Frequency (percentagea)

P-valuec

 

Birth cohort sample

(Years 2006 to 2008)

n = 1565

Deliveries in regionb

(Year 2006)

n = 8608

 

Gender of infant

   

   Male

764 (49.9%)

4462 (51.8%)

0.079

   Female

782 (50.1%)

4145 (48.2%)

 

   Missing data

19

0

 

Maternal age

   

   <20 years

87 (5.7%)

512 (5.9%)

0.239

   20-24 years

325 (21.1%)

1608 (18.7%)

 

   25-29 years

424 (27.6%)

2388 (27.7%)

 

   30-34 years

427 (27.8%)

2515 (29.2%)

 

   ≥35 years

274 (17.8%)

1584 (18.4%)

 

   Missing data

28

0

 

Birth weight

   

   <2500 g

39 (2.5%)

450 (5.5%)

<0.0005

   2500-3999 g

1266 (81.7%)

7073 (82.2%)

 

   ≥4000 g

244 (15.8%)

1060 (12.3%)

 

   Missing data

16

2

 

Gestational age at birth

   

   <28 weeks

0 (0.0%)

59 (0.7%)

<0.0005

   28-36 weeks

38 (2.4%)

536 (6.2%)

 

   37-41 weeks

1505 (97.2%)

7963 (92.5%)

 

   ≥42 weeks

6 (0.4%)

45 (0.5%)

 

   Missing data

16

4

 

Plurality

   

   Singleton

1532 (98.5%)

8388 (97.4%)

0.016

   Multiple

24 (1.5%)

220 (2.6%)

 

   Missing data

9

0

 

Outcome

   

   Live birth

1554 (99.9%)

8547 (99.3%)

0.007

   Stillbirth

2 (0.1%)

61 (0.7%)

 

   Missing data

9

0

 
  1. aPercentages are calculated based on the available (non-missing) data.
  2. bData for the study region (Logan, Gold Coast, Beaudesert, Tweed) are provided by Queensland Health and New South Wales Health.
  3. cChi-square test for comparing proportions between birth cohort sample and the general population.