Skip to main content

Table 3 Prevalence of high serum gamma-glutamyltransferase levels across occupational characteristics

From: Association between long working hours and serum gamma-glutamyltransferase levels in female workers: data from the fifth Korean National Health and Nutrition Examination Survey (2010-2011)

Variable

Serum GGT*

p-value§

Normal level group

High level group

N (%)

N (%)

Weekly working hours

   

 ≤29

321 (78.0)

79 (22.0)

0.002

 30–51

882 (83.1)

172 (16.9)

 

 ≥52

267 (73.4)

88 (26.6)

 

Working type

   

 Day work

1,200 (79.9)

278 (20.1)

0.820

 Non-day work

261 (80.6)

56 (19.4)

 

Occupation

   

 Manual work

212 (78.2)

54 (21.8)

0.489

 Non-manual work

1,257 (80.3)

285 (19.7)

 

Employment status

   

 Salary worker

947 (83.2)

180 (16.8)

<0.001

 Self-employed

218 (71.6)

71 (28.4)

 

 Unpaid family worker

75 (70.0)

32 (30.0)

 
  1. *Gamma-glutamyltransferase.
  2. Serum GGT ≥21 IU/L.
  3. Estimated percentage.
  4. §χ2 test.