Table 1.
Demographic characteristics of the investigated NPC patients and noncancer healthy controls
| Characteristics | Controls (n=352)
|
Cases (n=176)
|
P-valuea | ||||
|---|---|---|---|---|---|---|---|
| n | % | Mean (SD) | n | % | Mean (SD) | ||
|
| |||||||
| Age (years) | 48.7 (10.8) | 49.3 (9.4) | 0.7138 | ||||
| Gender | 1.0000 | ||||||
| Male | 256 | 72.7 | 128 | 72.7 | |||
| Female | 96 | 27.3 | 48 | 27.3 | |||
| Behavioral habits | |||||||
| Cigarette smoker | 150 | 42.6 | 73 | 41.4 | 0.8519 | ||
| Alcohol drinker | 124 | 35.2 | 72 | 40.9 | 0.2150 | ||
| Areca chewer | 115 | 32.7 | 54 | 30.7 | 0.6926 | ||
| Classification | |||||||
| KSCC (WHO type I) | 5 | 2.8 | |||||
| NKC (WHO type II) | 171 | 97.2 | |||||
| NKDC (WHO type IIa) | 28 | 15.9 | |||||
| NKUC (WHO type IIb) | 143 | 81.3 | |||||
Note:
a
Based on chi-squared test or Student’s t-test.
Abbreviations: KSCC, keratinizing squamous cell carcinoma; NKC, non-keratinizing carcinoma; NKDC, non-keratinizing differentiated carcinoma; NKUC, non-keratinizing undifferentiated carcinoma; NPC, nasopharyngeal carcinoma.