Table 2 Risk distribution of local population compared to study population by stratification model
Model | Smoking History | Risk Level | Risk Description | Study Population | Model Population |
|---|---|---|---|---|---|
Ang et al. 2010 [10] | HPV -ve: 73% HPV +ve: 65% | Low Risk | ≦ 10 PYHx or > 10 PYHx with N0-N2a | 66.7% | 64.0% |
Intermediate Risk | > 10 PYHx with N2b-N3 | 33.3% | 36.0% | ||
O’Sullivan et al. 2013 [13] | HPV -ve: 94% HPV +ve: 64% | Low risk | T1-T3, N0-N2c | 87.2% | 74.9% |
High risk | T4,N0-N2c or N3 | 12.8% | 25.1% | ||
Huang et al. 2015 [12] | HPV -ve: 15 PYHx HPV +ve: 40 PYHx | Low Risk | ≦ 20 PYHx | 62.4% | 49.4% |
Intermediate Risk | > 20 PYHx or Age ≦ 70 | 37.6% | 45.9% | ||
High Risk | Age > 70 | 0.0% | 4.7% | ||
Dahlstrom et al. 2016 [11] | HPV +ve: 82.5% | Low Risk | T1, N0-N2 | 24.8% | 29.5% |
Intermediate Risk | T2, N0-N2 or T3 or N3 | 64.1% | 59.0% | ||
High Risk | T4 | 11.1% | 11.5% |