Table 1. Generalised gamma AFT model applied to the lung cancer data.

Covariate	Coefficient (bi)	TR [exp(bi)]	95% CI	P-value
Treatment (RT+CAP vs RT alone)	0.640	1.90	(1.23–2.93)	0.004
Cell type (squamous vs nonsquamous)	0.536	1.71	(1.08–2.71)	0.02
Performance status (8–10 vs 5–7)	0.765	2.15	(1.09–4.24)	0.03

TR=time ratio; CI=confidence Interval; RT=radiotherapy; CAP=cytoxan, doxorubicin and platinum-based chemotherapy.