Table 3

Univariate and multivariate analysis of factors associated with death among n=342 with primary lung cancer; using Cox proportional hazards regression

 Factors† Total‡ (n=342) Died§ (n=273) pdays† (179 151) Rate (95% CI)/1000 pdays Univariate analysis Mulitivariate analysis HR (95% CI) P value* aHR (95% CI) P value* CAO No 297 229 169 737 1.35 (1.19 to 1.53) 1 <0.001 1 0.001 Yes 45 44 9414 4.67 (3.48 to 6.28) 2.52 (1.81 to 3.50) 1.78 (1.27 to 2.48) Age-group/years ≤60 52 44 24 437 1.80 (1.34 to 2.42) 1 0.02 1 0.003 61–70 108 77 69 891 1.10 (0.88 to 1.38) 0.72 (0.50 to 1.04) 0.70 (0.48 to 1.02) 71–80 120 93 60 201 1.54 (1.26 to 1.89) 0.93 (0.65 to 1.34) 0.96 (0.66 to 1.38) ≥81 62 59 24 622 2.40 (1.86 to 3.09) 1.25 (0.85 to 1.85) 1.34 (0.90 to 1.99) Gender Female 163 126 93 465 1.35 (1.13 to 1.60) 1 0.14 1 0.48 Male 179 147 85 686 1.71 (1.46 to 2.02) 1.19 (0.94 to 1.52) 1.09 (0.86 to 1.39) Stage ≥IIIB No 154 96 128 698 0.75 (0.61 to 0.91) 1 <0.001 1 <0.001 Yes 188 177 50 453 3.51 (3.03 to 4.07) 3.69 (2.85 to 4.78) 3.52 (2.70 to 4.60)
• *P values from the likelihood ratio test.

• †Total person days=179 151 unless otherwise indicated.

• ‡Denominator=342 unless otherwise indicated.

• §Number that died=273 unless otherwise indicated.

• aHR, adjusted hazard ratio; CAO, central airway obstruction on index CT scan; pdays, person days.