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Parameter B of Cox proportional hazards models for V20 and V30 for the two chest wall definitions
| B(CW2cm, VD) (cm−3) | B(CW3cm, VD) (cm−3) | |
|---|---|---|
| V20 | 0.0086 ± 0.0025 | 0.0058 ± 0.0017 |
| V30 | 0.011 ± 0.0032 | 0.007 ± 0.0022 |
The hazard function in the Cox proportional hazards model is given by: h(t) = h0(t) * exp(B*VD). Here exp(B) is the relative risk for patients with volumes increased by 1 cm3.
