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Table 2 Prevalence of each criteria for metabolic syndrome of subjects according to weekly working hours (N (%))

From: The association between long working hours and the metabolic syndrome: evidences from the 5th Korean National Health and Nutrition Examination Survey of 2010 and 2012

Criteria

Male (n = 2475)

Female (n = 1981)

Mean (SD)

Working hours per week

P**

p-trend††

Mean (SD)

Working hours per week

p**

p-trend††

30-39 (n = 239)

40-48 (n = 1180)

49-59 (n = 614)

≥60 (n = 442)

30-39 (n = 423)

40-48 (n = 1025)

49-59 (n = 337)

≥60 (n = 196)

CO*

WC 84.0 (8.9) BMI 24.2 (3.2)

52 (21.8)

298 (25.3)

136 (22.1)

99 (22.4)

0.347

0.410

WC 75.8 (9.4) BMI 22.8 (3.4)

141 (33.3)

294 (28.7)

98 (29.1)

67 (34.2)

0.191

0.925

TG

154.7 (117.6)

88 (36.8)

470 (39.8)

211 (34.4)

150 (33.9)

0.054

0.039

98.6 (68.4)

72 (17.0)

142 (13.9)

46 (13.7)

20 (10.3)

0.144

0.033

HDL

46.3 (10.4)

70 (29.3)

392 (33.2)

203 (33.1)

140 (31.7)

0.653

0.866

53.4 (11.1)

175 (41.4)

437 (42.7)

147 (43.6)

81 (41.3)

0.916

0.827

BP§

SBP 119.3 (14.6)

115 (48.1)

469 (39.7)

243 (39.6)

154 (34.8)

0.010

0.004

SBP 112.7 (15.8)

102 (24.1)

190 (18.5)

73 (21.7)

54 (27.6)

0.010

0.366

DBP 80.2 (10.6)

DBP 73.3 (9.4)

FPG

97.7 (20.8)

84 (35.1)

362 (30.7)

165 (26.9)

108 (24.4)

0.008

0.001

92.2 (16.7)

78 (18.4)

147 (14.4)

42 (12.5)

32 (16.4)

0.105

0.198

MS

 

34 (14.2)

224 (19.0)

91 (14.8)

381 (13.8)

0.021

0.074

 

75 (17.7)

143 (14.0)

50 (14.8)

33 (16.8)

0.286

0.692

  1. SD, standard deviation; p, p-value; CO, central obesity; WC, waist circumference (cm); BMI, body mass index (kg/m2); TG, triglyceride (mg/dL); HDL, high density lipoprotein (mg/dL); BP, blood pressure (mmHg); SBP, systolic blood pressure (mmHg), DBP, diastolic blood pressure (mmHg); FPG, fasting plasma glucose (mg/dL); MS, metabolic syndrome.
  2. *central obesity (WC ≥90 cm or BMI >30 kg/m2 in male, WC ≥80 cm or BMI >30 kg/m2 in female), raised TG ≥150 mg/dL or being treated, reduced HDL (≤40 mg/dL in male, ≤50 mg/dL in female or being treated), §raised BP (SBP ≥130 mmHg or DBP ≥85 mmHg or being treated), raised FPG ≥100 mg/dL or previous diagnosed type 2 diabetes, person with the metabolic syndrome must have central obesity plus any two of the four factors (FPG ≥100 mg/dL or previously diagnosed type 2 diabetes, TG ≥150 mg or being treated, reduced HDL (<40 mg/dL in male, <50 mg/dL in female) or being treated, and raised BP (SBP ≥130 mmHg or DBP ≥85 mmHg) or being treated.
  3. **calculated by chi-square test, ††calculated by chi-square test for trend.