Characteristics | Total (n = 809) | 0–14 group (n = 270) | 0–21 group (n = 270) | 0–28 group (n = 269) | P |
---|---|---|---|---|---|
Gender | Â | Â | Â | Â | 0.449 |
 Male | 592 (73.2) | 192 (71.1) | 196 (72.6) | 204 (75.8) |  |
 Female | 217 (26.8) | 78 (28.9) | 74 (27.4) | 65 (24.2) |  |
Age (years) | Â | Â | Â | Â | 0.229 |
 < 40 | 463 (57.2) | 144 (53.3) | 156 (57.8) | 163 (60.6) |  |
 ≥ 40 | 346 (42.8) | 126 (46.7) | 114 (42.2) | 106 (39.4) |  |
Education level | Â | Â | Â | Â | 0.335 |
 Junior high school or lower | 74 (9.1) | 31 (11.5) | 25 (9.3) | 18 (6.7) |  |
 Senior high school | 37 (4.6) | 10 (3.7) | 12 (4.4) | 15 (5.6) |  |
 College or higher | 698 (86.3) | 229 (84.8) | 233 (86.3) | 236 (87.7) |  |
Ethnicity | Â | Â | Â | Â | 0.366a |
 Han ethnicity | 797 (98.5) | 268 (99.3) | 264 (97.8) | 265 (98.5) |  |
 Other | 12 (1.5) | 2 (0.7) | 6 (2.2) | 4(1.5) |  |
Marital status | Â | Â | Â | Â | 0.267 |
 Married | 621 (76.8) | 217 (80.4) | 196 (72.6) | 208 (77.3) |  |
 Unmarried | 165 (20.4) | 47 (17.4) | 66 (24.4) | 52 (19.3) |  |
 Divorced or widowed | 23 (2.8) | 6 (2.2) | 8 (3.0) | 9 (3.4) |  |
BMI (kg/m2) | Â | Â | Â | Â | 0.848 |
 < 18.5 | 19 (2.3) | 8 (3.0) | 6 (2.2) | 5 (1.8) |  |
 18.5– | 33 3(41.2) | 110 (40.7) | 116 (43.0) | 107 (39.8) |  |
 ≥ 24 | 457 (56.5) | 152 (56.3) | 148 (54.8) | 157 (58.4) |  |
Influenza vaccination history | Â | Â | Â | 0.865 | |
 No | 549 (67.9) | 180 (66.7) | 184 (68.2) | 185 (68.8) |  |
 Yes | 260 (32.1) | 90 (33.3) | 86 (31.8) | 84 (31.2) |  |
Occupation | Â | Â | Â | Â | 0.991 |
 Public security officers | 405 (50.1) | 135 (50.0) | 136 (50.4) | 134 (49.8) |  |
 Airport ground staff | 404 (49.9) | 135 (50.0) | 134 (49.6) | 135 (50.2) |  |
Smoking | Â | Â | Â | Â | 0.368 |
 No | 545 (67.4) | 190 (70.4) | 181 (67.0) | 174 (64.7) |  |
 Yes | 264 (32.6) | 80 (29.6) | 89 (33.0) | 95 (35.3) |  |
Drinking | Â | Â | Â | Â | 0.906 |
 No | 621 (76.8) | 206 (76.3) | 206 (76.3) | 209 (77.7) |  |
 Yes | 188 (23.2) | 64 (23.7) | 64 (23.7) | 60 (22.3) |  |
Chronic diseases | Â | Â | Â | Â | 0.978 |
 No | 754 (93.2) | 252 (93.3) | 252 (93.3) | 250 (92.9) |  |
 Yes | 55 (6.8) | 18 (6.7) | 18 (6.7) | 19 (7.1) |  |