Table 1 The general characteristics of cases and controls
Characteristics | Case group(n = 48) | Control group(n = 96) |
|---|---|---|
Age | ||
Mean (± sd) | 50.7 (± 12.0) | 49.8 (± 11.5) |
Range | 25 – 72 | 24 – 75 |
Sex | ||
Female | 30 (62.5%) | 60 (62.5%) |
Male | 18 (37.5%) | 36 (37.5%) |
The living place | ||
Rural | 27 (56.3%) | 54 (56.3%) |
Urban | 21 (43.8%) | 42 (43.8%) |
The region of birth | ||
Van region | 48 (100%) | 96 (100%) |
Other | 0 | 0 |
Stage in time of admission | ||
Localized | 17 (35.4%) | |
Locally-advanced | 23 (47.9%) | |
Metastatic | 8 (16.7%) | |
Histological type | ||
SCC | 48 (100%) | |
Adenocarcinoma | 0 |