Table 1

Characteristics of NKR and the SKP group

	Male					Female
	NKR (n=161)		SKP (n=322)			NKR (n=547)		SKP (n=1094)
	N	Per cent	N	Per cent	p Value	N	Per cent	N	Per cent	p Value
Age (years)
Mean (SD)	46.9	(12.1)	46.9	(12.1)		44.1	(11.0)	44.1	(11.0)
30–39	50	31.1	100	31.1		231	42.2	462	42.2
40–49	58	36.0	116	36.0		167	30.5	334	30.5
50–59	23	14.3	46	14.3		78	14.3	156	14.3
60+	30	18.6	60	18.6		71	13.0	142	13.0
Education*					<0.001					<0.001
Primary school or below	3	2.0	28	14.9		11	2.2	145	22.3
Middle/high school	68	46.3	19	10.1		276	53.9	92	14.2
College or above	76	51.7	141	75.0		225	44.0	413	63.5
Family income* (10⁴ KRW/month)					<0.001					<0.001
<100	56	51.4	20	6.3		225	61.6	89	8.3
≥100	53	48.6	300	82.3		140	38.4	990	91.8
Alcohol consumption*					0.189					0.003
Current drinker	127	87.0	238	82.1		256	61.5	722	69.7
Non-drinker	19	13.0	52	17.9		160	38.5	314	30.3
Smoker*					0.086					0.003
Current	62	44.6	98	34.0		6	1.4	47	4.6
Ex and non-smoker	77	55.4	175	64.1		423	98.6	969	95.4
Regular exercise*					0.031					0.02
Yes	42	35.3	68	24.2		98	24.0	190	18.5
No	77	64.7	213	75.8		311	76.0	837	81.5
Length of stay in South Korea (years)*
Mean (SD)	3.6 (3.3)					3.2 (2.5)
<1	42	26.6				169	31.8
1–5	68	43.0				229	43.1
≥5	48	30.4				134	25.2
Length of stay in transit countries (years)*
Mean (SD)	2.1 (2.6)					4.1 (3.6)
<1	90	57.3				169	32.1
1–5	42	26.8				160	30.4
≥5	25	15.9				198	37.6
Weight gain (%)*
Mean (SD)	1.77 (6.71)					1.03 (4.88)
<5%	93	68.4				336	69.7
≥5%	43	31.6				146	30.3