Table 1 Sample characteristics by BMI category

Sex

p = 0.307^b

 Male

34.40% (31.68–37.22)

36.68% (32.54–41.03)

31.74% (25.86–38.26)

32.60% (25.53–40.56)

28.22% (19.59–38.82)

 Female

65.60% (62.78–68.32)

63.32% (58.97–67.46)

68.26% (61.74–74.14)

67.40% (59.44–74.47)

71.78% (61.18–80.41)

Age (years)

46.25 (45.19–47.31)

47.38 (46.17–48.58)

44.85 (42.96–46.73)

45.27 (41.59–48.96)

43.65 (40.27–47.02)

p = 0.043^c

BMI (kg/m²)

45.71 (45.36–46.05)

42.11 (41.97–42.24)

47.17 (47.00–47.33)

51.97 (51.50–52.43)

60.81 (59.84–61.78)

p < 0.001^c

Marital status

p = 0.763^b

 Living with partner/married

58.89% (54.94–62.73)

60.12% (56.30–63.83)

56.49% (49.31–63.41)

56.85% (46.05–67.04)

60.39% (47.56–71.93)

 Divorced/separated/widowed/

20.67% (18.25–23.32)

20.87% (17.85–24.25)

21.90% (16.59–28.32)

18.57% (13.09–25.68)

17.50% (10.40–27.94)

 Never married

20.43% (17.55–23.65)

19.01% (16.04–22.39)

21.61% (16.38–27.96)

24.57% (16.57–34.83)

22.11% (14.94–31.45)

Annual household income

p = 0.019^b

 < 20,000 US$

18.78% (15.82–22.15)

16.02% (12.71–20.01)

21.17% (16.52–26.72)

20.96% (13.73–30.64)

29.21% (20.26–40.13)

 ≥ 20,000 US$

81.22% (77.85–84.18)

83.98% (79.99–87.29)

78.83% (73.28–83.48)

79.04% (69.36–86.27)

70.79% (59.87–79.74)

Ethnicity/race

p = 0.629^b

 Mexican American

10.06% (7.35–13.61)

9.80% (6.97–13.61)

10.65% (6.51–16.97)

9.92% (5.28–17.89)✝

10.12% (4.73–20.33)✝

 Other Hispanic

5.17% (3.91–6.81)

5.07% (3.60–7.11)

5.12% (3.01–8.56)

5.59% (2.63–11.49)✝

5.54% (2.69–11.07)✝

 Non-Hispanic White

60.86% (55.43–66.03)

63.28% (57.01–69.12)

56.90% (48.56–64.86)

60.75% (49.33–71.10)

56.00% (45.43–66.06)

 Non-Hispanic Black

20.07% (16.52–24.16)

18.29% (14.64–22.61)

22.36% (17.15–28.60)

22.74% (15.57–31.95)

22.57% (16.08–30.71)

 Other Race ^a

3.84% (2.65–5.54)

3.56% (2.26–5.57)

4.97% (2.73–8.90)

0.99% (0.23–4.22)

5.78% (2.59–12.38)✝*

Educational level

p = 0.030^b

 Less than 9th grade

4.33% (3.36–5.55)

4.85% (3.50–6.69)

4.53% (2.74–7.41)

2.95% (1.60–5.38)✝

1.23% (0.27–5.33)*

 9-11th grade

12.28% (10.79–13.95)

10.83% (8.76–13.32)

12.47% (9.54–16.12)

16.64% (9.93–26.56)

17.48% (10.83–26.98)

 High school graduate/GED ^d

23.92% (21.39–26.65)

22.76% (19.49–26.38)

22.48% (17.46–28.45)

32.17% (20.68–46.31)

27.60% (19.21–37.92)

 Some college or AA degree ^e

40.57% (37.22–44.01)

39.98% (36.05–44.05)

40.89% (33.89–48.28)

38.61% (26.93–51.76)

46.63% (35.91–57.67)

 College graduate or above

18.89% (15.98–22.20)

21.58% (17.93–25.74)

19.63% (14.41–26.17)

9.63% (5.60–16.06)

7.07% (3.81–12.73)✝*

Self-reported special diet

p = 0.519^b

 Yes

27.67% (24.78–30.77)

26.03% (22.72–29.63)

30.08% (24.19–36.70)

30.73% (22.37–40.57)

28.18% (20.13–37.93)

 No

72.33% (69.23–75.22)

73.97% (70.37–77.28)

69.92% (63.30–75.81)

69.27% (59.43–77.63)

71.82% (62.07–79.87)

12 alcoholic drinks per year

p = 0.559^b

 No

31.61% (27.77–35.72)

32.24% (27.29–37.62)

30.49% (23.84–38.08)

26.75% (19.03–36.20)

36.86% (26.67–48.40)

 Yes

68.39% (64.28–72.23)

67.76% (62.38–72.71)

69.51% (61.92–76.16)

73.25% (63.80–80.97)

63.14% (51.60–73.34)

Smoking status

p = 0.183^b

 Non-smoker

57.98% (54.57–61.31)

56.05% (51.94–60.08)

62.43% (55.09–69.24)

60.09% (47.03–71.85)

54.62% (43.65–65.16)

 Current smoker

16.91% (14.53–19.60)

16.95% (14.14–20.20)

17.89% (13.50–23.33)

18.59% (11.79–28.05)

11.00% (6.23–18.71)

 Former smoker

25.11% (22.71–27.66)

27.00% (23.36–30.97)

19.67% (14.46–26.19)

21.33% (13.41–32.18)

34.37% (23.78–46.79)