Variables | Univariate model HR (95 % CI) | Full model HR (95 % CI) | Final model HR (95 % CI) |
---|---|---|---|
Serum vitamin D | |||
> = 20 ng/ml (reference) | |||
<20 ng/ml | 1.2 (0.9–1.6) | 0.99 (0.8–1.3) | |
Gender | |||
Female (reference) | |||
Male | 1.3 (1.01–1.6)* | 1.1 (0.9–1.5) | |
Stage | |||
III (reference) | |||
IV | 2.3 (1.8–3.1)* | 2.3 (1.7–3.2)* | 2.3 (1.7–3.1)* |
CTCA hospital | |||
Philadelphia, PA (reference) | |||
Zion, IL | 3.2 (1.8–5.8)* | 1.9 (0.9–4.1) | 2.0 (0.9–4.2) |
Tulsa, OK | 5.8 (3.0–11.2)* | 4.0 (1.8–8.8)* | 4.1 (1.9–8.9)* |
Histologic subtype | |||
Adenocarcinoma (reference) | |||
Squamous cell | 1.1 (0.8–1.4) | 0.9 (0.6–1.3) | 0.9 (0.7–1.3) |
Others | 2.3 (1.4–3.8)* | 1.8 (1.02–3.2)* | 1.7 (0.9–2.8) |
SGA | |||
Well-nourished (reference) | |||
Moderately-severely malnourished | 2.0 (1.6–2.6)* | 1.4 (1.02–1.8)* | 1.4 (1.1–1.9)* |
ECOG score | |||
0–1 (reference) | |||
2–4 | 1.6 (1.2–2.1)* | 1.2 (0.9–1.6) | |
Season of diagnosis | |||
Summer (reference) | |||
Fall | 1.0 (0.7–1.4) | 1.4 (0.9–1.9) | |
Winter | 1.2 (0.9–1.7) | 1.3 (0.9–1.8) | |
Spring | 1.1 (0.8–1.5) | 1.1 (0.8–1.6) | |
Smoking status | |||
Never (reference) | |||
Former | 1.5 (1.1–2.1)* | 1.4 (1.01–2.1)* | 1.5 (1.1–2.2)* |
Current | 1.6 (1.1–2.1)* | 1.3 (0.9–1.9) | 1.4 (0.9–1.9) |
Age (continuous) | 1.0 (0.99–1.01) | 1.01 (0.99–1.02) | |
Serum vitamin D (continuous) | 1.0 (0.99–1.01) | ||
BMI (continuous) | 0.97 (0.95–0.99)* | 0.99 (0.97–1.02) | |
Serum albumin (continuous) | 0.44 (0.35–0.54)* | 0.46 (0.34–0.61)* | 0.46 (0.35–0.61)* |