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Table 1 General characteristics of study participants by γ-glutamyltransferase (GGT) tertiles

From: Different associations between obesity and impaired fasting glucose depending on serum gamma-glutamyltransferase levels within normal range: a cross-sectional study

 

Tertiles of serum GGT

p

 

Tertile 1 (0 ~ 22 U/L)

Tertile 2 (23 ~ 34 U/L)

Tertile 3 (35 ~ 73 U/L)

 

Men (n = 2424)

N = 822

N = 800

N = 802

 

 Age (years)

56.2 ± 0.5

54.0 ± 0.5

52.6 ± 0.4

<0.001

 Body mass index (kg/m2)

22.8 ± 0.1

24.1 ± 0.1

24.6 ± 0.1

<0.001

 Smoking

   

<0.001

  Non-smoker

163(21.5%)

131(15.1%)

106(12.7%)

 

  Ex-smoker

454(49.5%)

393(46.4%)

351(39.3%)

 

  Current-smoker

205(29.0%)

276(38.5%)

345(48.0%)

 

 Alcohol drinking

   

<0.001

  Non-drinker

375(45.7%)

238(27.1%)

138(17.5%)

 

  Current-drinker1

447(54.3%)

562(72.9%)

664(82.5%)

 

 Physical activity

    

  Inactive

677(82.4%)

684(84.3%)

683(85.1%)

0.485

  Active2

145(17.6%)

116(15.7%)

119(14.9%)

 
 

Tertile 1 (0 ~ 14 U/L)

Tertile 2 (15 ~ 19 U/L)

Tertile 3 (20 ~ 48 U/L)

 

Women (n = 3652)

N = 1273

N = 1101

N = 1278

 

 Age (years)

53.1 ± 0.4

55.6 ± 0.4

56.5 ± 0.4

<0.001

 Body mass index (kg/m2)

22.9 ± 0.1

23.6 ± 0.1

24.7 ± 0.1

<0.001

 Smoking

   

0.174

  Non-smoker

1192(92.8%)

1019(91.9%)

1174(90.6%)

 

  Ex-smoker

41(3.8%)

41(3.7%)

45(3.5%)

 

  Current-smoker

40(3.4%)

41(4.4%)

59(5.8%)

 

 Alcohol drinking

   

0.008

  Non-drinker

913(68.9%)

741(62.6%)

831(62.3%)

 

  Current-drinker1

360(31.1%)

360(37.4%)

447(37.7%)

 

 Physical activity

    

  Inactive

1079(86.1%)

964(87.9%)

1087(83.8%)

0.073

  Active2

194(13.9%)

137(12.1%)

191(16.2%)

 
  1. All statistics are results from complex survey data analyses.
  2. 1participants with alcohol drinking on one or more times of the past 30 days.
  3. 2participants with moderate or vigorous physical activity on 5 or more days of the past 7 days.