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Table 1 Patient characteristics for the overall population as well as stratified by 2 serum vitamin D categories

From: The relationship between circulating 25-hydroxyvitamin D and survival in newly diagnosed advanced non-small-cell lung cancer

Categorical variables Overall population (n = 359) Deficient: <20 ng/ml (n = 151) Not deficient: > = 20 ng/ml (n = 208) P-value
Gender     0.85
 Male 181 77 (42.5) 104 (57.5)  
 Female 178 74 (41.6) 104 (58.4)  
Stage     0.90
 III 94 39 (41.5) 55 (58.5)  
 IV 265 112 (42.3) 153 (57.7)  
CTCA hospital     0.04*
 Philadelphia, PA 50 13 (26) 37 (74)  
 Zion, IL 269 119 (44.2) 150 (55.8)  
 Tulsa, OK 40 19 (47.5) 21 (52.5)  
Histologic subtypea     0.90
 Adenocarcinoma 268 114 (42.5) 154 (57.5)  
 Squamous cell 67 28 (41.8) 39 (58.2)  
 Others 19 9 (47.4) 10 (52.6)  
SGAa     0.07
 Well-nourished 211 81 (38.4) 130 (61.6)  
 Moderately-severely malnourished 124 60 (48.4) 64 (51.6)  
ECOG scorea     0.02*
 0–1 233 88 (37.8) 145 (62.2)  
 2–4 102 52 (51) 50 (49)  
Season of diagnosis     0.004*
 Summer 93 34 (36.6) 59 (63.4)  
 Fall 90 27 (30) 63 (70)  
 Winter 72 34 (47.2) 38 (52.8)  
 Spring 104 56 (53.8) 48 (46.2)  
Smoking Statusa     0.006*
 Never 69 27 (39.1) 42 (60.9)  
 Former 143 49 (34.3) 94 (65.7)  
 Current 143 75 (52.4) 68 (47.6)  
Vitamin D supplementation at diagnosis     0.92
 Yes 163 69 (42.3) 94 (57.7)  
 No 196 82 (41.8) 114 (58.2)  
Continuous variables Overall population (n = 359) Deficient: <20 ng/ml (n = 151) Not deficient: > = 20 ng/ml (n = 208) P-value
 Mean (SD) age (years) 57.4 (8.4) 57.1 (7.4) 57.6 (9.0) 0.62
 Mean (SD) vitamin D (ng/ml) 25.5 (15.3) 13.3 (4.1) 34.4 (14.3) <0.001*
 Mean (SD) BMI (kg/m2) 25.8 (5.7) 25.5 (5.9) 26 (5.7) 0.43
 Mean (SD) serum albumin (g/dl) 3.6 (0.57) 3.5 (0.57) 3.6 (0.57) 0.06
  1. (SGA Subjective Global Assessment, ECOG Eastern Cooperative Oncology Group, CTCA Cancer Treatment Centers of America, PA Pennsylvania, IL Illinois, OK Oklahoma, BMI Body Mass Index, g/dl grams per deciliter, ng/ml nanograms per milliliter, kg/m2 kilograms per meter squared, SD Standard Deviation)
  2. *P < = 0.05, Values in parentheses are row percentages
  3. aMissing data (Histology = 5; SGA = 24; ECOG = 24; Smoking status = 4)