Table 2.
Demographic and Exposure Characteristics for All Patients with Incident NPC (1999-2008).
| No. of Patients (%) | ||||
|---|---|---|---|---|
|
| ||||
| Characteristic | All (n = 183) |
WHO Type I (n = 18) |
WHO Type II/III (n = 165) |
P value* |
| Age, years | ||||
| <30 | 20 (10.9) | 1 (5.6) | 19 (11.5) | .036† |
| 30-59 | 126 (68.9) | 9 (50.0) | 117 (70.9) | |
| ≥60 | 37 (20.2) | 8 (44.4) | 29 (17.6) | |
| Sex | ||||
| Male | 130 (71.0) | 11 (61.1) | 119 (72.1) | .328 |
| Female | 53 (29.0) | 7 (38.9) | 46 (27.9) | |
| Ethnicity | ||||
| Non-Hispanic White | 97 (53.0) | 11 (61.1) | 86 (52.1) | .803† |
| Asian | 42 (23.0) | 3 (16.7) | 39 (23.6) | |
| Other | 44 (24.0) | 4 (22.2) | 40 (24.2) | |
| Smoking | ||||
| Never | 98 (53.6) | 6 (33.3) | 92 (55.8) | .180 |
| Former | 37 (20.2) | 5 (27.8) | 32 (19.4) | |
| Current | 48 (26.2) | 7 (38.9) | 41 (24.8) | |
| Pack-years of ever smokers‡ | ||||
| <30 pack-years | 43 (23.5) | 3 (16.7) | 40 (24.2) | .059† |
| ≥30 pack-years | 39 (21.3) | 9 (50.0) | 30 (18.2) | |
| Alcohol use | ||||
| Never/rare | 104 (56.8) | 11 (61.1) | 93 (56.4) | .001† |
| Former | 12 (6.6) | 5 (27.8) | 7 (4.2) | |
| Current | 67 (36.6) | 2 (11.1) | 65 (39.4) | |
| History of cancer in first-degree relative | ||||
| None | 116 (63.4) | 10 (55.6) | 106 (64.2) | .468 |
| Any cancer | 67 (36.6) | 8 (44.4) | 59 (35.8) | |
WHO- World Health Organization.
*
Chi-squared test comparing WHO type I to WHO type II/III.
†
Fisher's exact test comparing WHO type I to WHO type II/III.
‡
Pack-years was not documented for 3 WHO type II/III patients.