Table 1: Sample demographics stratified by country and gender.

China ( )Japan ( )South Korea ( )Taiwan ( )
Male
( )
Female
( )
Male
( )
Female
( )
Male
( )
Female
( )
Male
( )
Female
( )

Age (mean (SD))43.1 (12.3)42.3 (12.0)45.0 (12.6)44.9 (12.3)40.1 (12.1)39.5 (11.5)40.5 (13.6)41.5 (13.4)
Education level (% ( ))
 <High school61.6 (979)66.0 (1123)8.5 (65)3.8 (36)11.6 (73)14.7 (101)19.4 (175)29.7 (272)
 High school20.3 (322)17.9 (304)44.4 (340)52.7 (502)29.4 (186)36.0 (247)30.0 (270)25.8 (236)
 College and above18.2 (289)16.2 (275)47.1 (360)43.5 (414)59.0 (373)49.3 (338)50.6 (455)44.5 (407)
Marital status (% ( ))
 Single14.3 (227)9.7 (164)27.4 (210)17.0 (163)34.7 (219)23.2 (159)39.3 (353)29.9 (292)
 Married80.5 (1275)83.3 (1411)68.8 (528)75.9 (726)59.7 (377)69.0 (472)54.4 (493)60.2 (548)
 Divorced/widowed5.1 (81)7.0 (118)3.8 (29)7.1 (68)5.5 (35)7.7 (53)5.9 (53)10.0 (91)
Occupation (% ( ))
 Manual 51.9 (825)36.1 (615)40.0 (307)21.8 (209)27.4 (174)15.9 (109)37.0 (333)23.0 (210)
 Nonmanual24.8 (618)25.3 (430)46.0 (353)44.2 (423)49.4 (313)37.8 (259)39.0 (351)42.6 (390)
 No current work Income23.3 (370)38.6 (657)14.0 (107)34.0 (326)23.2 (147)46.4 (318)24.0 (216)34.4 (315)
SSS (mean (SD))3.9 (1.7)4.1 (1.7)5.12 (1.7)5.3 (1.6)4.7 (1.7)4.7 (1.6)4.8 (1.6)5.1 (1.5)
Weight status (% ( ))*
 Underweight (BMI < 18.5)6.9 (110)13.2 (225)4.0 (31)18.2 (174)2.2 (14)13.1 (90)5.1 (46)11.9 (109)
 Normal weight (BMI = 18.5 to 22.9)48.3 (768)50.0 (851)46.8 (359)56.6 (542)41.2 (261)60.4 (414)33.9 (305)48.3 (442)
 Overweight (BMI = 23.0 to 27.4)35.2 (560)30.4 (518)38.3 (294)20.9 (200)47.2 (299)21.9 (150)44.3 (399)29.5 (270)
 Obese (BMI ≥ 27.5)9.6 (152)6.4 (108)10.8 (83)4.4 (42)9.5 (60)4.7 (32)16.7 (150)10.3 (94)
Weight status (% ( ))**
 Underweight (BMI < 18.5)6.9 (110)13.2 (225)4.0 (31)18.2 (174)2.2 (14)13.1 (90)5.1 (46)11.9 (109)
 Normal weight (BMI = 18.5 to 24.9)68.5 (1089)67.5 (1148)70.7 (542)69.6 (667)67.8 (430)73.3 (503)55.1 (496)63.9 (585)
 Overweight (BMI = 25.0 to 29.9) 21.4 (340)17.3 (294)20.5 (157)10.7 (102)26.8 (170)12.5 (86)34.0 (306)19.5 (172)
 Obese (BMI ≥ 30)3.2 (51)2.1 (35)4.8 (37)1.6 (15)3.2 (20)1.0 (7)5.8 (52)5.4 (49)

Asia-specific BMI “trigger” cut-off points [27].
**World Health Organization standard BMI cut-off points [27].