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 | Â | Â | Â | Â |
   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 | Â | Â | Â | Â |
   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 | Â | Â | Â | Â |
   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 | Â | Â | Â | Â |
   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 | Â | Â | Â | Â |
   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 | Â | Â | Â | Â |
   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 |