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Table 2 Demographics and baseline characteristics of respondents by region.

From: Validation of a survey methodology for gastroesophageal reflux disease in China

 

Mean ± SD or number of subjects (%)

Variables

Urban (n = 359*)

Suburban (n = 224*)

Rural (n = 336*)

Total (n = 919*)

Age (years)

45.7 ± 14.5

45.2 ± 13.1

49.0 ± 12.2

46.7 ± 13.4

Weight (kg)

63.0 ± 11.0

61.2 ± 10.1

59.3 ± 8.2

61.2 ± 10.0

Height (cm)

167.3 ± 8.2

162.8 ± 7.7

162.0 ± 6.8

164.3 ± 8.0

Body mass index (kg/m 2)

22.4 ± 3.0

23.1 ± 3.3

22.6 ± 2.7

22.6 ± 3.0

Sex

    

   Female

193 (53.8)

139 (62.1)

177 (52.7)

509 (55.4)

   Male

166 (46.2)

85 (38.0)

159 (47.3)

410 (44.6)

Marital status

    

   Married

266 (75.1)

197 (88.7)

306 (94.2)

796 (85.4)

   Unmarried

88 (24.9)

25 (11.3)

19 (5.9)

132 (14.7)

Maximum education level

    

   Primary school/uneducated

4 (1.1)

61 (27.2)

189 (56.8)

254 (27.7)

   Secondary/high school

232 (64.6)

138 (61.6)

139 (41.7)

509 (55.6)

   College graduate or beyond

123 (34.3)

25 (11.2)

5 (1.5)

153 (16.7)

   Years of school education

12.3 ± 2.5

8.9 ± 3.7

6.2 ± 3.6

9.3 ± 4.2

Current job

    

   Government employee

20 (5.6)

1 (0.5)

1 (0.3)

22 (2.4)

   Professional or technician

144 (40.3)

18 (8.0)

12 (3.6)

174 (19.02)

   Blue-collar worker

70 (19.6)

40 (17.9)

51 (15.3)

161 (17.6)

   Agricultural or fisheries worker

1 (0.3)

98 (43.8)

243 (72.8)

342 (37.4)

   Student in school

30 (8.4)

7 (3.1)

4 (1.2)

41 (4.5)

   Others

92 (25.7)

60 (26.8)

23 (6.9)

175 (19.1)

Total family income per month †

    

   less than 1999 Yuan

178 (50.9)

124 (57.1)

232 (69.2)

534 (59.2)

   2000–4999 Yuan

157 (44.9)

81 (37.3)

98 (29.3)

336 (37.3)

   5000–9999 Yuan

13 (3.7)

12 (5.4)

4 (1.2)

29 (3.2)

   10000 Yuan or above

2 (0.6)

0 (0)

1 (0.3)

3 (0.3)

Smoking

    

   No

282 (78.6)

163 (73.4)

225 (68.2)

670 (73.6)

   Yes

77 (21.5)

59 (26.6)

105 (31.8)

241 (26.5)

   Years of smoking

22.5 ± 11.6

20.6 ± 12.6

19.63 ± 11.7

20.8 ± 11.9

Alcohol intake

    

   No

308 (85.8)

193 (87.3)

251 (76.1)

752 (82.6)

   Yes

51 (14.2)

28 (12.7)

79 (23.4)

158 (17.4)

   Years of alcohol intake

18.7 ± 11.1

21.06 ± 11.9

18.26 ± 10.9

18.69 ± 11.1

  1. *Totals may not tally exactly where individual subjects have refused to answer a specific question.
  2. †2000 Yuan is equivalent to approximately 260 USD, at an approximate exchange rate of 7.7 Yuan = 1 USD (April 2007).