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Table 2 Children born between 2007-2008, maternal demographic data, birth characteristics and medical care

From: Maternal advanced age, single parenthood, and ART increase the risk of child morbidity up to five years of age

 

Total

Maternal age

 

n =23 772

≤39 years

n = 15 569

≥40 years

n = 8203

 
 

n (%)

n (%)

n (%)

p-value

Maternal age

   

NA

 ≤39 years

15 569 (65.5)

-

-

 

 ≥40 years

8203 (34.5)

-

-

 

Civil status

   

<.001

 Married/cohabiting

20 767 (87.4)

13 877 (89.1)

6890 (84.0)

 

 Single status at registration

3005 (12.6)

1692 (10.9)

1313 (16.0)

 

Maternal educational level

   

<.001

 Elementary

2611 (11.2)

1948 (12.7)

663 (8.3)

 

 High school

6245 (40.7)

6245 (40.7)

2951 (36.8)

 

 College/University

7156 (46.6)

7156 (46.6)

4400 (54.9)

 

Nicotine use during pregnancy

   

<.001

 No

20 289 (90.0)

13 268 (89.5)

7021 (91.2)

 

 Yes

2242 (10.0)

1564 (10.5)

678 (8.8)

 

Gender

   

.772

 Boy

12 361 (52.0)

8085 (51.9)

4276 (52.1)

 

 Girl

11 411 (48.0)

7484 (48.1)

3927 (47.9)

 

Assisted reproductive technologya

   

<.001

 No

22 577 (95.0)

15 095 (97.0)

7482 (91.2)

 

 Yes

1195 (5.0)

474 (3.0)

721 (8.8)

 

Gestational age

   

.020

 Born at term

22 185 (93.4)

14 573 (93.7)

7612 (92.9)

 

 Born pretermb

1570 (6.6)

986 (6.3)

584 (7.1)

 

Birthweight

   

.013

 Normal birthweight

22 611 (95.3)

14 846 (95.5)

7765 (94.8)

 

 Low birthweightc

1122 (4.7)

696 (4.5)

426 (5.2)

 

Size for gestational age

   

<.001

 Average for gestational age

22 273 (93.7)

15 288 (98.2)

7978 (97.3)

 

 Small for gestational age

506 (2.1)

281 (1.8)

225 (2.7)

 

Hospitalizations

    

 Outpatient (median/IQR)

2.00/5.00

2.00/5.00

2.00/5.00

.114

 Inpatient (median/IQR)

0.00/1.00

0.00/1.00

0.00/1.00

.007

 Total (median/IQR)

3.00/6.00

3.00/6.00

3.00/5.00

.041

Outpatient visits

   

.743

 0-10

21 046 (88.6)

13 776 (88.5)

7270 (88.6)

 

 11-

2726 (11.5)

1793 (11.5)

933 (11.4)

 

Inpatient visits

   

.203

 0-1

20 893 (87.9)

13 653 (87.7)

7240 (88.6)

 

 2-

2879 (12.1)

1916 (12.3)

963 (11.7)

 
  1. a Assisted reproductive technology (ART): ovulation induction, in vitro fertilization (IVF) or intra-plasmic sperm injection (ICSI) with own or donated gametes
  2. b Born preterm (PT): born at <37 weeks’ gestation
  3. c Low birth weight (LBW): birth weight <2500 g