Skip to main content

Table 2 Characteristics of female study participants (n = 2171)

From: Associations between family factors and body weight gain from 20 years old

 

Model 1 (BMI> = 2.5 kg/m2)a

Model 2 (BMI> = 3.5 kg/m2)a

Casesb, c

Contorlsb, c

p c

Casesb, c

Contorlsb, c

p d

(n = 706)

(n = 1465)

(n = 482)

(n = 1689)

Age (yr)e

54.8 ± 9.7

54.6 ± 10.8

0.651

54.7 ± 9.7

54.7 ± 10.7

0.972

BMI (kg/m2)e

25.0 ± 3.4

20.5 ± 2.3

0.123

25.9 ± 3.5

20.8 ± 2.4

<0.001

 Height (cm)e

155.6 ± 5.3

155.7 ± 5.8

0.259

155.7 ± 5.4

155.6 ± 5.7

0.715

 Weight (kg)e

60.6 ± 8.9

49.7 ± 6.1

<0.001

63.0 ± 9.1

50.4 ± 6.3

<0.001

 Obesity, n (%)

307 (43.5)

44 (3.0)

<0.001

266 (55.2)

85 (5.0)

<0.001

BMI on 20 yr. (kg/m2)e

20.2 ± 2.3

20.9 ± 2.3

<0.001

20.3 ± 2.4

20.8 ± 2.3

<0.001

 Weight on 20 yr. (kg)e

48.9 ± 6.1

50.5 ± 5.9

<0.001

49.2 ± 6.3

50.2 ± 5.9

<0.001

 Obesity, n (%)

26 (3.7)

67 (4.6)

0.337

21 (4.4)

72 (4.3)

0.899

Physical activity (METs)e

31.4 ± 7.3

32.0 ± 7.3

0.075

31.3 ± 7.5

32.0 ± 7.3

0.076

Smoking status, n (%)

705

1463

<0.01

481

1687

<0.001

 Never smokers

586 (83.0)

1282 (87.5)

 

394 (81.7)

1474 (87.4)

 

 Former smokers

73 (10.3)

97 (6.6)

 

57 (11.8)

113 (6.7)

 

 Current smokers

46 (6.5)

84 (5.7)

 

30 (6.2)

100 (5.9)

 

Habitual drinking, n (%)

706

1464

0.393

482

1688

0.101

 Never drinkers

411 (58.2)

832 (56.8)

 

290 (60.2)

953 (56.5)

 

 Former drinkers

13 (1.8)

18 (1.2)

 

10 (2.1)

21 (1.2)

 

 Current drinkers

282 (39.9)

614 (41.9)

 

182 (37.8)

714 (42.3)

 

Stress Feeling, n (%)

706

1465

<0.01

482

1689

0.126

 Many times

48 (6.8)

113 (7.7)

 

33 (6.8)

128 (7.6)

 

 Normal

300 (42.5)

713 (48.7)

 

208 (43.2)

805 (47.7)

 

 Nothing

358 (50.7)

639 (43.6)

 

241 (50.0)

756 (44.8)

 

Education, n (%)

706

1465

0.139

482

1689

0.865

  < 12 yr

51 (7.2)

98 (6.7)

 

33 (6.8)

116 (6.9)

 

 12 yr

356 (50.4)

752 (51.3)

 

247 (51.2)

861 (51.0)

 

  > = 12 yr

299 (42.4)

615 (42.0)

 

202 (41.9)

712 (42.2)

 

Marital status, n (%)

706

1465

<0.001

482

1689

<0.05

 Unmarried

23 (3.3)

107 (7.3)

 

14 (2.9)

116 (6.9)

 

 Married

607 (86.0)

1163 (79.4)

 

414 (85.9)

1356 (80.3)

 

 Bereavement/divorce

76 (10.8)

195 (13.3)

 

54 (11.2)

217 (12.8)

 

Family structure, n (%)

705

1461

0.176

482

1684

0.266

 Single

29 (4.1)

83 (5.7)

 

19 (16.8)

93 (19.1)

 

 Couple

120 (17.0)

282 (19.2)

 

81 (3.9)

321 (5.5)

 

 Two generations

358 (50.7)

688 (47.0)

 

247 (51.2)

799 (47.4)

 

 Three generations

198 (28.0)

408 (27.8)

 

135 (28.0)

471 (28.0)

 

Family relationships, n (%)

703

1459

<0.001

480

1682

0.163

 Good

273 (38.8)

642 (44.0)

 

187 (38.8)

728 (43.3)

 

 Somewhat good

339 (48.2)

674 (46.2)

 

233 (48.3)

780 (46.4)

 

 ‘Not so good’/‘not good’

91 (12.9)

143 (9.8)

 

60 (12.4)

174 (10.3)

 

Pregnancy, n (%)

705

1459

<0.001

482

1682

<0.001

 Nothing

44 (6.2)

165 (11.3)

 

25 (5.2)

184 (10.9)

 

 1 time

61 (8.7)

100 (6.9)

 

46 (9.5)

115 (6.8)

 

  > =2 times

600 (85.1)

1194 (81.8)

 

411 (85.3)

1383 (82.2)

 

Childbirth, n (%)

706

1465

<0.001

482

1689

<0.001

 Nothing

56 (7.9)

195 (13.3)

 

34 (7.1)

217 (12.8)

 

 1 time

81 (11.5)

127 (8.7)

 

62 (12.9)

146 (8.6)

 

  > =2 times

569 (80.6)

1143 (78.0)

 

386 (80.1)

1326 (78.5)

 

Miscarriage, n (%)

577

1122

0.557

391

1308

0.859

 Nothing

483 (83.7)

950 (84.7)

 

333 (85.2)

1100 (84.1)

 

 1 time

62 (10.7)

123 (11.0)

 

41 (10.5)

144 (11.1)

 

  > =2 times

32 (5.5)

49 (4.4)

 

17 (4.3)

64 (4.9)

 
  1. BMI body mass index
  2. aIncrement of BMI ≥2.5 and 3.5 kg/m2 from BMI_20yr were meant ≥6.0 and 8.4 kg of body weight gain among Japanese women with their average height, in Model 1 and 2, respectively
  3. bCases and controls were defined as the study participants with ‘positive’ and ‘negative’ of each cut-off value on body weight gain in Model 1 and 2, respectively
  4. cNumbers of ‘unknown’ were not shown
  5. dt- or chi-square tests
  6. eValues were shown as mean ± standard deviation