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Table 5 Prevalence of psychiatric disorders at six and 11 years (any psychiatric disorder, internalizing and externalizing disorders) according to categories of gestational age among singleton pregnancies, Pelotas, Brazil

From: Gestational age at birth and behavioral problems from four to 11 years of age: birth cohort study

Gestational age (completed weeks)

6 years

 

11 years

Psychiatric disorders n (%)

p-valuea

Internalizing disordersn (%)

p-valuea

Externalizing disordersn (%)

p-valuea

 

Psychiatric disordersn (%)

p-valuea

Internalizing disordersn (%)

p-valuea

Externalizing disordersn (%)

p-valuea

Girls

  

0.488

 

0.706

 

0.389

  

0.128

 

0.436

 

0.388

<34

2(6.3)

 

2 (6.3)

 

0 (0)

  

3 (9.4)

 

1 (3.1)

 

1 (3.1)

 

34–36

21 (12.7)

 

17 (10.3)

 

5 (3.0)

  

21 (12.7)

 

10 (6.1)

 

8 (4.9)

 

37+

142 (10.5)

 

119 (8.8)

 

24 (1.8)

  

109 (8.1)

 

54 (4.0)

 

39 (2.9)

 

All

165 (10.7)

 

138 (8.9)

 

29 (1.9)

  

133 (8.6)

 

54 (4.2)

 

48 (3.1)

 

Boys

  

0.324

 

0.230

 

0.890

  

0.143

 

0.746

 

0.842

<34

3 (7.0)

 

1 (2.3)

 

3 (7.0)

  

7 (16.3)

 

1 (2.3)

 

3 (7.0)

 

34–36

28 (15.9)

 

19 (10.8)

 

10 (5.7)

  

31 (17.6)

 

8 (4.6)

 

15 (8.5)

 

37+

205 (14.3)

 

135 (9.4)

 

77 (5.4)

  

180 (12.5)

 

69 (4.8)

 

105 (7.3)

 

All

236 (14.3)

 

155 (9.4)

 

90 (5.4)

  

218 (13.2)

 

78 (4.7)

 

123 (7.4)

 
  1. a p-value = Pearson X 2 test