Table 1 General characteristics of the subjects
From: Occupational Factors Associated with Changes in the Body Mass Index of Korean Male Manual Workers
Variables | 5 years or less* | More than 5 years* | ||||
|---|---|---|---|---|---|---|
Mean ± SD (kg/m 2) | No(%) | BMI change (Mean ± SD, kg/m 2) | Mean ± SD (kg/m 2) | No(%) | BMI change (Mean ± SD, kg/m 2) | |
Age (years) | 32.60 ± 6.52 | 38.31 ± 7.23 | ||||
Education | ||||||
High school or lower | 55(36.4) | 0.43 ± 1.30 | 92(62.2) | 0.40 ± 1.06 | ||
College or higher | 96(63.6) | 0.38 ± 0.90 | 56(37.8) | 0.06 ± 0.93 | ||
Marital status | ||||||
Single or divorced | 70(46.4) | 0.41 ± 1.09 | 35(23.6) | 0.08 ± 1.05 | ||
Married | 81(53.6) | 0.39 ± 1.04 | 113(76.4) | 0.33 ± 1.01 | ||
Smoking† | ||||||
Never or formerly smoked | 64(42.4) | 0.31 ± 1.00 | 61(41.2) | 0.28 ± 1.00 | ||
Started or resumed smoking | 8( 5.3) | 0.57 ± 1.58 | 2( 1.4) | −0.39 ± 0.49 | ||
Quit smoking | 7( 4.6) | 0.43 ± 1.15 | 7( 4.7) | 1.12 ± 1.01 | ||
Continued smoking | 66(43.7) | 0.52 ± 1.07 | 69(46.6) | 0.20 ± 1.06 | ||
Alcohol drinking‡ | ||||||
Non-drinking | 17(11.3) | 0.13 ± 0.82 | 20(13.5) | 0.42 ± 1.17 | ||
No change | 22(14.6) | 0.50 ± 0.80 | 21(14.2) | 0.39 ± 0.70 | ||
Decrease in drinking | 60(39.7) | 0.45 ± 1.05 | 57(38.5) | 0.30 ± 1.16 | ||
Increase in drinking | 46(30.5) | 0.46 ± 1.27 | 41(27.7) | 0.11 ± 0.96 | ||
Regular exercise§ | ||||||
Not performed | 116(76.8) | 0.39 ± 0.98 | 103(69.6) | 0.18 ± 0.94 | ||
Stopped performing | 12( 7.9) | 0.48 ± 1.31 | 15(10.1) | 0.55 ± 0.88 | ||
Began performing | 17(11.3) | 0.56 ± 1.39 | 23(15.5) | 0.56 ± 1.42 | ||
Continued performing | 6( 4.0) | 0.11 ± 1.17 | 7( 4.7) | −0.02 ± 0.71 | ||
Coffee drinking (cups/day) | 2.41 ± 1.54 | 2.74 ± 1.69 | ||||
Amount of sleep | ||||||
< 7 hours | 80(53.0) | 0.42 ± 1.03 | 79(53.4) | 0.24 ± 0.94 | ||
≥ 7 hours | 71(47.0) | 0.38 ± 1.09 | 69(46.6) | 0.31 ± 1.11 | ||