Dg. Grant et al., Pre-treatment anaemia alters outcome in early squamous cell carcinoma of the larynx treated by radical radiotherapy, J LARYNG OT, 113(9), 1999, pp. 829-833
The purpose of this study was to examine the effect of pre-treatment anaemi
a on tumour recurrence and survival in patients treated with primary radiot
herapy for early squamous cell carcinoma of the larynx. A retrospective ana
lysis of 117 patients with previously untreated T1N0M0 and T2N0M0 squamous
cell carcinoma of the larynx was carried out. Patients were considered anae
mic if their pre-treatment haemoglobin levels were below 13 g/dl in males a
nd 11.5 g/dl in females. The influence of pre-treatment haemoglobin levels
on local control and survival were evaluated using Cox proportional hazards
regression models.
Two- and five-year local-regional control estimates for anaemic patients we
re 58 per cent and 53 per cent respectively while patients with normal haem
oglobin levels had two and five-year local-regional control rates of 90 per
cent and 81 per cent respectively (p = 0.002). Multivariate Cox regression
analysis showed pre-treatment haemoglobin significantly influencing recurr
ence-free survival (p = 0.0094).
Patients with a low haemoglobin level prior to radiation therapy suffered h
igher levels of local-regional failure.