The relationship between night work and involuntary weight change: data from the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012)

Table 5 Odds ratios (OR) and 95 % confidence intervals (CI) for involuntary weight change

		Male			Female
		Model 1^a	Model 2^b	Model 3^c	Model 1^a	Model 2^b	Model 3^c
Weight loss
	Day work	1.00	1.00	1.00	1.00	1.00	1.00
	Night work	0.52(0.24–1.11)	0.44(0.20–0.95)	0.34(0.16–0.76)	0.81(0.22–2.93)	0.66(0.15–2.84)	0.58(0.14–2.40)
Stratification by working hours per week
≤48	Day work	1.00	1.00	1.00	1.00	1.00	1.00
	Night work	0.25(0.42–1.45)	0.23(0.36–1.50)	0.22(0.03–1.50)	0.60(0.12–3.05)	0.57(0.10–3.16)	0.47(0.08–2.93)
>48	Day work	1.00	1.00	1.00	1.00	1.00	1.00
	Night work	0.56(0.24–1.34)	0.44(0.16–1.20)	0.35(0.12–1.00)	1.64(0.17–16.07)	1.43(0.08–27.08)	1.95(0.47–80.86)
Weight gain
	Day work	1.00	1.00	1.00	1.00	1.00	1.00
	Night work	0.84(0.44–1.59)	0.92(0.46–1.84)	0.98(0.48–2.02)	1.34(0.40–4.54)	1.19(0.33–4.30)	0.80(0.22–2.85)
Stratification by working hours per week
≤48	Day work	1.00	1.00	1.00	1.00	1.00	1.00
	Night work	0.57(0.17–1.90)	0.53(0.15–1.93)	0.49(0.13–1.92)	0.57(0.12–2.76)	0.53(0.10–2.67)	0.34(0.40–2.87)
>48	Day work	1.00	1.00	1.00	1.00	1.00	1.00
	Night work	1.19(0.55–2.61)	1.75(0.70–4.28)	1.55(0.57–4.18)	5.04(0.77–32.89)	9.58(0.83–110.20)	2.83(0.12–69.83)

^aModel 1: crude model
^bModel 2: adjusted with socio-demographic factors (age, education, household income, and marital status)
^cModel 3: adjusted with socio-demographic factors (age, education, household income, and marital status), health behavior-related factors (smoking, alcohol drinking, and physical activity), and occupational factors (type of job and working hours per week)

ISSN: 2052-4374