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Table 3 Demographics and lifestyle characteristics of participants by region.

From: Systematic investigation of gastrointestinal diseases in China (SILC): validation of survey methodology

Variables

Shanghai

(n = 3151)

Beijing

(n = 3168)

Wuhan

(n = 3283)

Xi'an

(n = 3266)

Guangzhou

(n = 3210)

Total (n = 16 078)

Age (years)

47.7 ± 14.1

42.7 ± 15.3

41.5 ± 15.4

41.6 ± 15.2

39.0 ± 14.3

42.5 ± 15.2

Weight (kg)

63.0 ± 11.4

65.1 ± 11.4

60.1 ± 10.1

60.8 ± 10.2

57.8 ± 9.9

61.3 ± 10.9

Height (cm)

164.4 ± 8.1

165.8 ± 8.0

164.1 ± 7.6

165.3 ± 7.7

162.4 ± 8.1

164.4 ± 8.0

Body mass index (kg/m 2 )

23.2 ± 3.3

23.7 ± 3.5

22.3 ± 3.2

22.2 ± 3.2

21.9 ± 3.1

22.6 ± 3.3

Female sex

1749 (55.5)

1682 (53.1)

1719 (52.4)

1647 (50.4)

1593 (49.6)

8390 (52.2)

Urban area

1572 (49.9)

1551 (49.0)

1653 (50.4)

1617 (49.5)

1679 (52.3)

8072 (50.2)

Smoking

926 (29.4)

962 (30.4)

899 (27.4)

912 (27.9)

732 (22.8)

4431 (27.6)

Alcohol use (≥ 4 times per month)

628 (19.9)

780 (24.6)

791 (24.1)

528 (16.2)

535 (16.7)

3262 (20.3)

Family history of gastrointestinal disease

487 (15.5)

98 (3.1)

396 (12.1)

275 (8.4)

171 (5.3)

1427 (8.9)

Married

2693 (85.5)

2421 (76.4)

2597 (79.1)

2583 (79.1)

2288 (71.3)

12 582 (78.3)

  1. Data are mean ± standard deviation or number (%) of participants.