Table 2.
Comparison of general data in the two groups, n (%)
| Research group (n = 89) | Control group (n = 95) | χ2 or t | P value | |
| Age (yr) | 0.888 | 0.376 | ||
| 49.2 ± 8.6 | 50.3 ± 8.2 | |||
| BMI (kg/cm2) | 0.963 | 0.337 | ||
| 23.62 ± 3.52 | 24.16 ± 4.05 | |||
| Disease course (mo) | 0.174 | 0.862 | ||
| 7.62 ± 4.16 | 7.51 ± 4.38 | |||
| Gender | 0.870 | 0.351 | ||
| Male | 62 (69.66) | 60 (63.16) | ||
| Female | 27 (30.34) | 35 (36.84) | ||
| Smoking | 0.095 | 0.758 | ||
| Yes | 60 (65.26) | 62 (65.26) | ||
| No | 29 (32.58) | 33 (34.74) | ||
| Drinking | 0.684 | 0.408 | ||
| Yes | 55 (61.80) | 53 (55.79) | ||
| No | 34 (38.20) | 42 (44.21) | ||
| Preference for betel nut | 0.284 | 0.594 | ||
| Yes | 65 (73.03) | 66 (69.47) | ||
| No | 24 (26.97) | 29 (30.53) | ||
| Dietary preference | 0.432 | 0.511 | ||
| Spicy | 52 (58.43) | 60 (63.16) | ||
| Light | 37 (41.57) | 35 (36.84) | ||
| Exercise habits | 0.382 | 0.537 | ||
| Yes | 12 (13.48) | 10 (10.53) | ||
| No | 77 (86.52) | 85 (89.47) | ||
| Tissue type | 0.486 | 0.975 | ||
| Squamous cell carcinoma | 38 (42.70) | 38 (40.00) | ||
| Malignant lymphoma | 16 (17.98) | 15 (15.79) | ||
| Mucoepidermoid carcinoma | 18 (20.22) | 22 (23.16) | ||
| Adenoid cystic carcinoma | 10 (11.24) | 12 (12.63) | ||
| Adenocarcinoma | 7(7.87) | 8 (8.42) | ||
| Pathological staging | 0.354 | 0.552 | ||
| I-II | 16 (17.98) | 14 (14.74) | ||
| III-IV | 73 (82.02) | 81 (85.26) | ||
| Metastasis | 0.000 | 0.991 | ||
| Yes | 75 (84.27) | 80 (84.21) | ||
| No | 14 (15.73) | 15 (15.79) | ||
| Degree of differentiation | 0.368 | 0.051 | ||
| Poorly differentiated | 79 (88.76) | 80 (84.21) | ||
| Moderately and highly differentiated | 10 (11.24) | 15 (15.79) | ||
| Nationality | 0.812 | 0.368 | ||
| Han | 85 (95.51) | 89 (93.68) | ||
| Ethnic minorities | 4 (4.49) | 6 (6.32) | ||
| Living environment | 0.367 | 0.545 | ||
| Cities and towns | 62 (69.66) | 70 (73.68) | ||
| Countryside | 27 (30.34) | 25 (26.32) |