Table I.
Variable | Patients (n=436) | Controls ( n=496) | P-valuea | ||
---|---|---|---|---|---|
|
|
||||
n | % | n | % | ||
Age (years) | 0.536 | ||||
≤40 | 23 | 5.3 | 18 | 3.6 | |
41–50 | 50 | 11.5 | 64 | 12.9 | |
51–60 | 132 | 30.3 | 166 | 33.5 | |
61–70 | 160 | 36.7 | 178 | 35.9 | |
>70 | 71 | 16.3 | 70 | 14.1 | |
Metastasis at diagnosis | |||||
Stage I | 131 | 30.0 | |||
Stage II | 162 | 37.2 | |||
Stage III | 90 | 20.6 | |||
Stage IV | 53 | 12.2 | |||
Histological differentiation | |||||
Low | 56 | 12.8 | |||
Intermediate | 166 | 38.1 | |||
High | 214 | 49.1 |
Two-sided χ2 test.