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Table 3 Involuntary weight change according to characteristics in male subjects

From: The relationship between night work and involuntary weight change: data from the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012)

 

No weight change

Weight loss

Weight gain

Variable

na(%b)

na(%b)

na(%b)

Total

2219990(100.0)

278769(100.0)

461583(100.0)

Age(years)c,d

 20–29

309365(13.9)

61956(22.2)

158128(34.3)

 30–39

638936(28.8)

129157(46.3)

212184(46.0)

 40–49

687560(31.0)

48748(17.5)

58346(12.6)

 50–59

416913(18.8)

15891(5.7)

25780(5.6)

 60–69

167216(7.5)

23016(8.3)

7145(1.5)

Educationd

  ≤ Middle school

415384(18.7)

41724(15.0)

36381(7.9)

 High school

809988(36.5)

121416(43.6)

188938(40.9)

  ≥ University

994617(44.8)

115629(41.5)

236265(51.2)

Income

 1st quartile

128890(5.8)

37409(13.4)

30107(6.5)

 2nd quartile

690811(31.1)

81863(29.4)

154665(33.5)

 3rd quartile

784316(35.3)

109728(39.4)

149192(32.3)

 4th quartile

615973(27.7)

49770(17.9)

127619(27.6)

Marital status d

 Single

406539(18.3)

80784(29.0)

142844(30.9)

 Married

1749396(78.8)

188786(67.7)

305228(66.1)

 Others

64055(2.9)

9199(3.3)

13512(2.9)

Alcohol drinkingd

 None or social

1410436(63.5)

177538(63.7)

244719(53.0)

 Moderate or heavy

809553(36.5)

101232(36.3)

216864(47.0)

Smoking

 None or ex-smoker

1022453(46.1)

96115(34.5)

171118(37.1)

 Current smoker

1197536(53.9)

182654(65.5)

290465(62.9)

Physical activity

 Light

1848629(83.3)

219257(78.7)

416536(90.2)

 Moderate

123131(5.5)

21311(7.6)

11341(2.5)

 Vigorous

248230(11.2)

38202(13.7)

33707(7.3)

Type of jobc

 Non-manual

965184(43.5)

74162(26.6)

218173(47.3)

 Manual

1254805(56.5)

204607(73.4)

243411(52.7)

Working hours per week

  ≤ 48

1183501(53.3)

119901(43.0)

285045(61.8)

  > 48

1036489(46.7)

158868(57.0)

176538(38.2)

Work schedule

 Day work

1938500(87.3)

259215(93.0)

411605(89.2)

 Night work

281489(12.7)

19554(7.0)

49978(10.8)

  1. aestimated population size
  2. bcolumn and estimated percentage
  3. csignificantly different between no weight change and weight loss subjects (p < 0.05)
  4. dsignificantly different between no weight change and weight gain subjects (p < 0.05)