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Table 1 Body composition variables, weight status and parental socio-economic status in the study cohorts, by familial response behavior

From: Association between parental socioeconomic status with underweight and obesity in children from two Spanish birth cohorts: a changing relationship

 

Birth cohort

 

1999-2000 (n = 1158)

2007-2008 (n = 1588)

 

Respondents SES

Non-respondents SES

Total

Respondents SES

Non-respondents SES

Total

Boys, n (%)

253 (46.5)

334 (54.2)

587 (50.7)

715 (51.1)

91 (47.9)

806 (50.8)

Girls, n (%)

291 (53.5)

280 (45.5)

571 (49.3)

571 (48.9)

99 (52.1)

782 (49.2)

Age mean, years (range)

9.4 (8–11)

9.7 (8–11)

9.5 (8–11)

5.3 (4–7)

5.4 (4–7)

5.3 (4–7)

Body composition variables, mean (SD)

Weight (kg)

37.3 (9.3)

37.4 (9.1)

37.3 (9.2)

21.3 (4.7)

21.7 (5.0)

21.4 (4.8)

Height (cm)

139.6 (7.2)

139.5 (6.8)

139.6 (7.0)

115.4 (6.1)

115.7 (5.8)

115.5 (6.1)

BMI (kg/m2)

19.0 (3.7)

19.0 (3.7)

19.0 (3.7)

15.9 (2.4)

16.0 (2.6)

15.9 (2.5)

BF%

25.4 (6.6)

25.2 (6.9)

25.3 (6.8)

20.1 (5.8)

20.5 (6.2)

20.2 (5.8)

Weight status categories, % (95 % CI)

Underweight

7.5 (5.2-9.8)

8.6 (6.3-10.9)

8.1 (6.5-9.7)

20.5 (18.4-22.7)

20.5 (14.5-26.5)

20.5 (18.5-22.5)

Normal weight

57.4 (53.1-61.6)

55.4 (51.5-59.5)

56.4 (53.5-59.3)

59.2 (56.5-61.8)

57.9 (50.6-65.2)

59.0 (56.5-61.4)

Overweight

25.9 (22.1-29.7)

25.0 (21.6-28.6)

25.5 (22.9-28.0)

12.0 (10.3-13.7)

10.5 (5.9-15.1)

11.8 (10.2-13.4)

Obesity

9.2 (6.7-11.7)

10.7 (8.2-13.3)

10.0 (8.2-11.8)

8.3 (6.8-9.8)

11.1 (6.3-15.8)

8.6 (7.2-10.0)

Overweight/obesity

35.1 (31.0-39.2)

35.7 (31.9-39.7)

35.5 (32.7-38.3)

20.3 (18.2-22.5)

21.6 (15.5-27.7)

20.4 (18.4-22.5)

Parental socio-economic status, % (95 % CI)

 

N = 544

N = 1398

Lower

1.6 (0.5-2.9)

3.5 (2.5-4.5)

Lower middle

18.9 (15.5-22.3)

27.3 (24.9-29.7)

Middle

38.2 (34.1-42.4)

44.8 (42.2-47.5)

Upper middle

31.8 (27.8-35.8)

19.9 (17.8-22.1)

Upper

9.4 (6.8-11.9)

4.4 (3.2-5.5)

  1. Abbreviations: BMI body mass index, BF% body fat percentage, SD Standard deviation, CI confidence interval