Table 1.
Characteristics in case (patients with pharyngeal cancer) and control group.
| Variables | Control | Pharyngeal Cancer | p Value |
|---|---|---|---|
| N | 2584 | 1292 | |
| Age at index date | 0.927 | ||
| <40 | 491 (19.00%) | 246 (19.04%) | |
| 40–59 | 1460 (56.50%) | 740 (57.28%) | |
| 60–79 | 581 (22.48%) | 283 (21.90%) | |
| ≥80 | 52 (2.01%) | 23 (1.78%) | |
| Sex | 0.656 | ||
| Female | 643 (24.88%) | 330 (25.54%) | |
| Male | 1941 (75.12%) | 962 (74.46%) | |
| Urbanization | 0.867 | ||
| Urban | 1415 (54.76%) | 707 (54.72%) | |
| Sub-urban | 829 (32.08%) | 422 (32.66%) | |
| Rural | 340 (13.16%) | 163 (12.62%) | |
| Co-morbidities ‡ | |||
| Diabetes mellitus | 356 (13.78%) | 170 (13.16%) | 0.596 |
| Hypertension | 689 (26.66%) | 336 (26.01%) | 0.662 |
| Hyperlipidaemia | 454 (17.57%) | 215 (16.64%) | 0.471 |
| Chronic kidney disease | 73 (2.83%) | 44 (3.41%) | 0.319 |
| Depression | 35 (1.35%) | 20 (1.55%) | 0.631 |
| Stroke | 106 (4.10%) | 58 (4.49%) | 0.573 |
| Ulcer of esophagus | 215 (8.32%) | 107 (8.28%) | 0.967 |
| Allergies | 850 (32.89%) | 414 (32.04%) | 0.594 |
| COPD | 342 (13.24%) | 164 (12.69%) | 0.637 |
| Hepatitis | 321 (12.42%) | 169 (13.08%) | 0.561 |
| HPV | 95(3.68%) | 51(3.95%) | 0.676 |
| Amount of medical utilization † | |||
| Length of hospital stay (days) | 0.772 | ||
| 0 | 2289 (88.58%) | 1137 (88.00%) | |
| 1–13 | 236 (9.13%) | 121 (9.37%) | |
| ≥14 | 59 (2.28%) | 34 (2.63%) | |
| Time of dental visit | 0.289 | ||
| 0 | 1592 (61.61%) | 763 (59.06%) | |
| 1–2 | 542 (20.98%) | 284 (21.98%) | |
| ≥3 | 450 (17.41%) | 245 (18.96%) |
‡ Co-morbidity was identified within 2 years before index date. † Amount of medical utilization was identified within 1 year before index date.