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Table 1 Patient demographics and characteristics

From: Association of body mass index and outcomes following lobectomy for non-small-cell lung cancer

  BMI < 18.5 BMI 18.5–24.9 BMI 25–29.9 BMI ≥ 30  
Underweight Normal Overweight Obesity
n = 40 (3.3%) n = 662 (55.3%) n = 428 (35.7%) n = 68 (5.7%)
Variables No. % No. % No. % No. % P
Age, (years), mean (s.d.) 61.3 ± 8.7 58.8 ± 9.5 58.6 ± 9.2 59.6 ± 8.3 0.323
FEV1 predicted, mean (s.d.) 83.3 ± 23.4 90.6 ± 18.6 92.2 ± 16.5 86.6 ± 18.8 0.004
DLCO predicted, mean (s.d.) 63.0 ± 14.7 87.2 ± 15.8 83.8 ± 15.5 84.7 ± 15.1 0.000
Sex          0.020
 Male 33 82.5 464 70.1 281 65.7 39 57.4  
 Female 7 17.5 198 29.9 147 34.3 29 42.6  
Alcohol-drinking history 26 65.0 339 51.2 197 46.0 31 45.6 0.069
Cigarette-smoking history 27 67.5 413 62.4 233 54.4 33 48.5 0.011
Albumin levels (g/dL)          0.000
 Normal (≥ 3.5) 33 82.5 615 92.9 415 97.0 66 97.1  
 Abnormal (<  3.5) 7 17.5 47 7.1 13 3.0 2 2.9  
ASA score          0.231
 I—no disturbance 8 20.0 117 17.7 70 16.4 4 5.9  
 II—mild disturbance 28 70.0 498 75.2 324 75.7 56 82.4  
 III—severe disturbance 4 10.0 47 7.1 34 7.9 8 11.8  
Hypertension 2 5.0 112 16.9 115 26.9 36 52.9 0.000
Diabetes mellitus 0 0.0 51 7.7 57 13.3 12 17.6 0.000
Other comorbidities 2 5.0 28 4.2 19 4.4 3 4.4 0.956
Type of resection          0.031
 Left upper lobectomy 8 20.0 118 17.8 80 18.7 15 22.1  
 Left lower lobectomy 9 22.5 157 31.7 96 22.5 19 27.9  
 Right upper lobectomy 15 37.5 160 24.2 135 31.5 22 32.4  
 Right middle lobectomy 0 0.0 60 9.1 24 5.6 5 7.4  
 Right lower lobectomy 8 20.0 167 25.2 93 21.7 7 10.3  
Histologic type          0.320
 Adenocarcinoma 22 55.0 387 58.5 269 62.9 47 69.1  
 Squamous cell carcinoma 18 45.0 263 39.7 150 35.0 21 30.9  
 Other type 0 0.0 12 1.8 9 2.1 0 0.0  
Tumor stage          0.041
 I 14 35.0 294 44.4 217 50.7 35 51.5  
 II 12 30.0 213 32.2 101 23.6 17 25.0  
 III 12 35.0 155 23.4 110 25.7 16 23.5  
  1. Italic values: P < 0.05 was significant. Categorical variables were compared using chi-square test. Continuous variables were compared using analysis of variance
  2. ASA score American Society of Anesthesiologists score, BMI body mass index, DLCO predicted carbon monoxide diffusing capacity as a percent of predicted, FEV1 predicted forced expiratory volume in 1 s as a percent of predicted, s.d standard deviation