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Table 2 Association Between Economic Status and Possible Mediators

From: Association between economic status and body mass index among adolescents: a community-based cross-sectional study in Japan

 

Boys

Girls

Non-Low

Low

p

Non-Low

Low

p

n

%

n

%

n

%

n

%

Family characteristics

          

 Family structure

          

  Both biological parents

926

(96.06)

38

(3.94)

0.219

910

(98.06)

18

(1.94)

<0.001

  Single parent or stepfamily

193

(94.15)

12

(5.85)

185

(90.24)

20

(9.76)

 Family members’ smoking status (mother, father, or others)

  None

542

(95.93)

23

(4.07)

0.736

514

(97.53)

13

(2.47)

0.122

  Yes (≥1 person)

577

(95.53)

27

(4.47)

581

(95.87)

25

(4.13)

Child characteristics

          

 Breakfast skipping

          

  No (eat breakfast daily)

990

(95.93)

42

(4.07)

0.336

944

(98.03)

19

(1.97)

<0.001

  Yes (skip breakfast ≥ 1 time per week)

129

(94.16)

8

(5.84)

151

(88.82)

19

(11.18)

 Convenience stores or fast-food outlets

   < 1 time per week

916

(95.52)

43

(4.48)

0.455

929

(96.67)

32

(3.33)

0.915

   ≥ 1 time per week

203

(96.67)

7

(3.33)

166

(96.51)

6

(3.49)

 Club activities at school

  Physical

819

(96.35)

31

(3.65)

0.065

562

(97.74)

13

(2.26)

0.092

  Non-physical

70

(90.91)

7

(9.09)

309

(95.96)

13

(4.04)

  No participation

230

(95.04)

12

(4.96)

224

(94.92)

12

(5.08)

 Activities outside of school

  Yes

378

(94.97)

20

(5.03)

0.364

456

(97.85)

10

(2.15)

0.059

  No

741

(96.11)

30

(3.89)

639

(95.80)

28

(4.20)

 Sleeping patterns

   ≥ 6 h 30 min (Q2-Q5)

915

(95.81)

40

(4.19)

0.752

805

(97.46)

21

(2.54)

0.013

   < 6 h 30 min (Q1)

204

(95.33)

10

(4.67)

290

(94.46)

17

(5.54)

 Self-rated health status

  Good (excellent, good, fair)

1041

(96.03)

43

(3.97)

0.061

1008

(97.58)

25

(2.42)

<0.001

  Not good (somewhat poor or poor)

78

(91.76)

7

(8.24)

87

(87.00)

13

(13.00)

 Smoking status

  No

1079

(95.83)

47

(4.17)

0.373

1072

(96.84)

35

(3.16)

0.019

  Yes

40

(93.02)

3

(6.98)

23

(88.46)

3

(11.54)

  1. Note. Chi square test