Risk factors for tuberculosis after gastrectomy in gastric cancer

Table 1 Baseline characteristics of gastrectomy patients

Characteristic	Total(n = 1776)	No active TB(n = 1760)	Active TB(n = 16)	P value
Age (yr)	58 (20-89)	58 (20-89)	54 (40-83)	0.395
< 40	169 (9.5)	168 (9.5)	1 (6.3)
41-60	843 (47.5)	834 (47.4)	9 (56.3)
61-80	743 (41.8)	738 (41.9)	5 (31.3)
> 80	21 (1.2)	20 (1.1)	1 (6.3)
Sex, male	1156 (65.1)	1142 (64.9)	14 (87.5)	0.059
Smoking	887 (49.9)	873 (49.6)	14 (87.5)	0.010
Alcohol	591 (33.4)	579 (33.0)	12 (75.0)	0.001
BMI1 (kg/m2)	23.4 (21.5-25.2)	23.4 (21.5-25.2)	22.4 (18.5-23.9)	0.015
< 18.5	71 (4.0)	67 (3.8)	4 (25.0)	< 0.001
18.5-24.99	1219 (68.8)	1208 (68.8)	11 (68.8)
≥ 25	482 (27.2)	481 (27.4)	1 (0.2)
Postoperative BMI2 (kg/m2)	21.3 (19.5-23.1)	21.3 (19.5-23.1)	18.8 (18.2-20.6)	0.001
Comorbidity
Diabetes mellitus	173 (9.7)	171 (9.7)	2 (12.5)	0.664
Other malignancy	36 (2.0)	36 (2.0)	0 (0.0)	1.000
Previous TB infection	200 (11.3)	191 (10.9)	9 (56.3)	< 0.001
Laboratory data
Hemoglobin (g/dL)	13.8 (12.6-14.8)	13.8 (12.6-14.8)	13.6 (12.4-14.6)	0.340
Albumin (g/dL)	4.6 (4.4-4.8)	4.6 (4.4-4.8)	4.6 (4.3-4.9)	0.195
Cholesterol (mg/dL)	182 (160-206)	182 (160-206)	177 (152-190)	0.120
ASA physical status				0.222
Class I	1241 (69.9)	1226 (69.7)	15 (93.8)
Class II	495 (27.9)	494 (28.1)	1 (6.3)
Class III	40 (2.2)	40 (2.2)	0
Surgery extent, total gastrectomy	359 (20.2)	351 (19.9)	8 (50.0)	0.007
Cancer stage				0.616
IA	1255 (70.6)	1245 (70.7)	10 (62.5)
IB	253 (14.2)	252 (14.3)	1 (6.3)
II	156 (8.8)	153 (8.7)	3 (18.8)
III	94 (5.3)	92 (5.2)	2 (12.5)
IV	5 (0.3)	5 (0.3)	0 (0)
Cancer cell type				0.762
Adenocarcinoma	1239 (69.7)	1227 (69.7)	12 (75.0)
Signet-ring cell	454 (25.6)	451 (25.6)	3 (18.7)
Others	72 (4.0)	71 (4.0)	1 (6.2)
Death	42 (2.4)	53 (3.0)	1 (6.3)	0.391

Data are presented as n (%) or median (interquartile range) unless otherwise indicated.

¹Measured BMI before gastrectomy;

²Measured BMI about 1 yr after gastrectomy; not measured in 233 (13%) patients. TB: Tuberculosis; BMI: Body mass index; CXR: Chest X-ray; ASA: American Society of Anesthesiologists.