Table 2.
Demographic characteristics of NPC cases and controls
| Categories | NPC cases (N1=200), n (%) | Controls (N2=200), n (%) |
p Value† | |||
| Early stage (n=33) | Advanced stage (n=167) | p Value* | Total | |||
| Gender | 0.472 | 0.417 | ||||
| Male | 27 (81.8) | 127 (76.0) | 154 (77.0) | 147 (73.5) | ||
| Female | 6 (18.2) | 40 (24.0) | 46 (23.0) | 53 (26.5) | ||
| Age (years) | 0.299 | 0.785 | ||||
| ~30 | 6 (18.2) | 47 (28.1) | 53 (26.5) | 47 (23.5) | ||
| ~40 | 13 (39.4) | 70 (41.9) | 83 (41.5) | 87 (43.5) | ||
| ~50 | 14 (42.4) | 50 (29.9) | 64 (32.0) | 66 (33.0) | ||
| Smoking‡ | 0.857 | 0.746 | ||||
| Yes | 11 (33.3) | 53 (31.7) | 64 (32.0) | 61 (30.5) | ||
| No | 22 (66.7) | 114 (68.3) | 136 (68.0) | 139 (69.5) | ||
| Drinking§ | 0.641 | 0.494 | ||||
| Yes | 6 (18.2) | 25 (15.0) | 31 (15.5) | 27 (13.5) | ||
| No | 27 (81.8) | 142 (85.0) | 169 (84.5) | 173 (86.5) | ||
| NPC family history¶ | 0.732 | 0.224 | ||||
| Yes | 3 (9.1) | 13 (7.8) | 16 (8.0) | 10 (5.0) | ||
| No | 30 (90.9) | 154 (92.2) | 184 (92.0) | 190 (95.0) | ||
*Differences in early-stage and advanced-stage NPC were compared by χ2 tests (Fisher’s exact test for NPC family history). p<0.05 was considered as statistically significant.
†Differences in NPC cases and controls were compared by χ2 tests. p<0.05 was considered as statistically significant.
‡Smoking refers to people who smoked more than one cigarette every 3 days within half a year and included current and former smokers.
§
Drinking refers to people who consumed alcoholic beverages every week within half a year and included current and former drinkers.
¶
NPC family history refers to people whose parents, children and siblings have or did have NPC.
NPC, nasopharyngeal carcinoma.