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Table 5 Crude and adjusted ORs (95% CI) for mortality outcomes by maternal age

From: Childbearing during adolescence and offspring mortality: findings from three population-based cohorts in southern Brazil

 

1982

1993

2004

 

Pooled cohorts

Maternal age, y

Deaths/Births (MR)*

Crude OR (95%CI)

Adjusted OR (95%CI) ¹

Deaths/Births (MR)*

Crude OR (95%CI)

Adjusted OR (95%CI) ¹

Deaths/Births (MR)*

Crude OR (95%CI)

Adjusted OR (95%CI) ¹

P valueb

Deaths/Births (MR)*

Crude OR (95%CI)2

Adjusted OR (95%CI) 3

FETAL MORTALITY

          
          

0.838

   

< 20

9/917

(9.8)

0.8

(0.4; 1.6)

0.5

(0.3; 1.2)

8/918

(8.7)

1.0

(0.4; 2.2)

0.7

(0.3; 1.7)

6/803

(7.4)

0.9

(0.4; 2.3)

0.6

(0.2; 1.8)

 

23/2,638

(8.7)

0.9

(0.5; 1.4)

0.6

(0.4; 1.0)

20-29

44/3,424

(12.9)

1.0

1.0

25/2,779

(9.0)

1.0

1.0

17/2,084

(8.0)

1.0

1.0

 

86/8,287

(10.4)

1.0

1.0

P-value

 

0.446 a

0.107 a

 

0.937 a

0.409 a

 

0.852 a

0.365 a

  

0.522 a

0.054 a

EARLY NEONATAL MORTALITY

          
          

0.713

   

< 20

16/908

(17.6)

1.3

(0.7; 2.3)

1.2

(0.6; 2.3)

8/910

(8.8)

0.9

(0.4; 2.1)

1.0

(0.4; 2.5)

9/792

(11.4)

1.2

(0.5; 2.6)

0.9

(0.3; 2.2)

 

33/2,610

(12.6)

1.2

(0.8; 1.7)

1.0

(0.7; 1.6)

20-29

46/3,380

(13.6)

1.0

1.0

26/2,754

(9.4)

1.0

1.0

20/2,062

(9.7)

1.0

1.0

 

92/8,196

(11.2)

1.0

1.0

P-value

 

0.380 a

0.584 a

 

0.859 a

0.990 a

 

0.695 a

0.808 a

  

0.479 a

0.853 a

LATE NEONATAL MORTALITY

          
          

0.656

   

< 20

4/908

(4.4)

1.5

(0.5; 4.8)

1.1

(0.3; 3.9)

4/910

(4.4)

2.0

(0.6; 7.2)

1.9

(0.4; 7.8)

6/792

(7.6)

3.1

(1.0; 10.3)

2.5

(0.6; 10.5)

 

14/2,610

(5.4)

2.1

(1.1; 4.1)

1.6

(0.7; 3.4)

20-29

10/3,380

(3.0)

1.0

1.0

6/2,754

(2.2)

1.0

1.0

5/2,062

(2.4)

1.0

1.0

 

21/8,196

(2.6)

1.0

1.0

P-value

 

0.513 a

0.901 a

 

0.292 a

0.399 a

 

0.062 a

0.216 a

  

0.040 a

0.272 a

POSTNEONATAL MORTALITY

          
          

0.682

   

< 20

23/908

(25.3)

1.6

(1.0; 2.7)

2.2

(1.3; 3.7)

5/910

(5.5)

0.8

(0.3; 2.3)

1.1

(0.3; 3.4)

8/792

(10.1)

1.4

(0.6; 3.3)

1.8

(0.6; 4.9)

 

36/2,610

(13.8)

1.4

(0.9; 2.1)

1.8

(1.1; 2.9)

20-29

53/3,380

(15.7)

1.0

1.0

18/2,754

(6.5)

1.0

1.0

15/2,062

(7.3)

1.0

1.0

 

86/8,196

(10.5)

1.0

1.0

P-value

 

0.061 a

0.017 a

 

0.726 a

0.906 a

 

0.460 a

0.278 a

  

0.100 a

0.012 a

  1. Pelotas, Brazil, 1982, 1993, and 2004
  2. *MR (mortality rate) = number of deaths per 1,000 live births for early neonatal, late neonatal, and postneonatal period. Fetal mortality rate is expressed as number of fetal deaths per 1,000 births (stillbirth and live birth).
  3. a Likelihood ratio test. b Likelihood ratio test for interaction.
  4. ¹ Adjusted for family income, maternal schooling, maternal skin color, marital status, and parity.
  5. 2 Adjusted for cohort year.
  6. 3 Adjusted for variables in model 1 plus model 2.