Occupational Factors Associated with Changes in the Body Mass Index of Korean Male Manual Workers

Table 4 Factors associated with change in BMI for the short-term work group*

	Variables	B	SE ^†	β	t	p-value
Age		−0.02	0.02	−0.12	−1.13	0.263
Education	High school or lower (Ref)
	College or higher	−0.06	0.22	−0.03	−0.28	0.783
Marital status	Single or divorced (Ref)
	Married	0.06	0.22	0.03	0.29	0.771
Smoking^‡	Never or formerly smoked (Ref)
	Started or resumed smoking	0.50	0.48	0.10	1.05	0.298
	Quit smoking	0.27	0.46	0.06	0.59	0.558
	Continued smoking	0.25	0.23	0.12	1.09	0.279
Alcohol drinking^§	Non-drinking (Ref)
	No change	0.29	0.40	0.10	0.72	0.470
	Decrease in drinking	0.21	0.34	0.10	0.62	0.533
	Increase in drinking	0.16	0.37	0.07	0.43	0.670
Regular exercise^∥	Not performed (Ref)
	Stopped performing	0.11	0.36	0.03	0.32	0.751
	Began performing	0.16	0.31	0.05	0.51	0.608
	Continued performing	0.35	0.55	0.06	0.64	0.525
Coffee drinking		0.01	0.07	0.02	0.16	0.873
Amount of sleep	< 7 hours (Ref)
	≥ 7 hours	−0.04	0.20	−0.02	−0.19	0.851
Working hours	≤ 9 hours (Ref)
	> 9 hours, < 12 hours	0.34	0.25	0.16	1.35	0.181
	≥ 12 hours	0.61	0.32	0.24	1.88	0.062
Shift work	No shift work (Ref)
	Two shifts	0.50	0.42	0.13	1.18	0.239
	Three shifts	0.73	0.34	0.26	2.13	0.035
Sitting time	0-24% (Ref)
	25-49%	0.07	0.33	0.03	0.20	0.842
	50-74%	−0.06	0.37	−0.02	−0.15	0.883
	75-100%	0.64	0.39	0.23	1.65	0.101
Job stress	Job demand	−0.20	0.23	−0.09	−0.86	0.393
	Insufficient job control	−0.55	0.24	−0.24	−2.29	0.024
	Inadequate social support	0.01	0.24	0.01	0.06	0.956
	Job insecurity	0.33	0.25	0.13	1.33	0.186
	Organizational injustice	0.10	0.26	0.04	0.40	0.690
	Lack of reward	−0.52	0.26	−0.22	−2.01	0.047
	Poor occupational climate	0.07	0.23	0.03	0.30	0.768

Dependent variable: The change in body mass indices between 2012 and 2013.
R² = 0.229.
* Experience of 5 years or less working at the present post.
† Standard error.
‡ The change in smoking status between 2012 and 2013.
§ The change in the weekly amount of alcohol drinking between 2012 and 2013.
∥ The change in regular exercise performance between 2012 and 2013. Those performing high- or moderate-intensity exercise were regarded as getting regular exercise.

ISSN: 2052-4374