Table 1.
Distributions of characteristics in HNSCC cases and controls
| Variables | Cases N (%) | Controls N (%) | P a |
|---|---|---|---|
| All subjects | 570 (100.00) | 597 (100.00) | |
| Age | |||
| <60 | 277 (48.60) | 285 (47.74) | 0.769 |
| ≥60 | 293 (51.40) | 312 (52.26) | |
| Gender | |||
| Females | 213 (37.37) | 223 (37.35) | 0.996 |
| Males | 357 (62.63) | 374 (62.65) | |
| Smoking status | |||
| Never | 312 (54.74) | 344 (57.62) | 0.321 |
| Ever | 258 (45.26) | 253 (42.38) | |
| Drinking status | |||
| Never | 318 (55.79) | 405 (67.84) | <0.001 |
| Ever | 252 (44.21) | 192 (32.16) | |
| Tumor sites | |||
| Oral cavity | 458 (80.53) | ||
| Oropharynx | 9 (1.58) | ||
| Larynx | 100 (17.54) | ||
| Otherb | 3 (0.53) | ||
HNSCC, head and neck squamous cell carcinoma.
a
Two‐sided chi‐square test.
b
Including nasal sinuses, parotid, and salivary gland.
P value in bold is statistically significant.