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Abstract  Our study involves a preliminary phase II trial, which evaluates the activity, feasibility and tolerability of a sequential combination of docetaxel and gemcitabine followed by docetaxel and carboplatin, as first-line treatment for inoperable NSCLC. Twenty-six chemo-naïve patients aged less than 75 years with histologically or cytologically confirmed unresectable stage IIIB, IV or relapsed post-operative metastatic NSCLC were included in the study. Gemcitabine 1,250 mg/m2 was administered and was followed by docetaxel 65 mg/m2. Treatment was administered on days 1 and 14 in a 28-day cycle for three consecutive cycles. If patients had no progressive disease after three cycles of chemotherapy, they received another three cycles of docetaxel 65 mg/m2 followed by carboplatin AUC5 on day 1 in a 21-day cycle. Recombinant human granocyte colony-stimulating factor (rhG-CSF) was given prophylactically. In addition, all patients received standard pre- and post- treatment with oral dexamethasone. Response rates at three cycles were: 19% achieved a partial response (PR), 46% had stable disease (SD) and 23% had progressive disease. At six cycles, 8% of the patients maintained PR, 19% showed SD and 35% had progressive disease. The median time-to-disease progression was 6 months. The median survival time of patients was 10 months while, at the end of the first year, the patients who managed to get through the complete therapy (20 patients) had a survival rate of 38%. This detailed analysis of 20 patients showed that 80% of the patients survived for up to 6 months, 38% up to 12 months and 19% for more than a year. The only risk factor associated with the hazard of death among the factors studied was the performance status of the patients. Patients with PS = 0 presented a median survival time of 13 months and those with PS = 1, it was only 9 months. Non-haematological and haematological toxic effects were generally mild to moderate and entirely manageable. [ABSTRACT FROM AUTHOR]