食管癌切除术后围术期死亡危险因素的分析及预测模型的建立

表2 影响食管癌手术死亡率的因素及量化赋值结果

变量	因素	赋值
X1	Sex	Male(1), female(2)
X2	Nationality	Han(1), Kazak(2), Uyghur(3), Hui(4), Mongolian(5), other(6)
X3	Age	<40 yr(1), 40-49 yr(2), 50-59 yr(3), 60-69 yr(4)>70 yr(5)
X4	BMI	≤18.4(1), 18.5-24.9(2), 25.0-29.9(3), 30.0-34.0(4), 35.0-39.9(5)
X5	Duration of symptom	<3 mo(1), 4-12 mo(2), >12 mo(3)
X6	History of long term severe smoking	No smoking(0), <5 yr(1), 5-10 yr(2), 10-15 yr(3), >15 yr(4)
X7	Preoperative pulmonary function	Normal(0), mild damaged(1), middle damaged(2), severe damaged(3)
X8	History of diabetes or coronary heart disease or hypertention	Without(0), HBP(1), DM(2), HD(3), Coronary artery disease and Stent implantation state(4), HBP and DM(5), HBP and HD(6), withHD、DM、HBP(7)
X9	Preoperative albumin	<35.0 g/L(1), 35.0-50.0 g/L(2), >50.0 g/L(3);
X10	Preoperative hemoglobin	male <60 g/L(1), 60-90 g/L(2), 90-120(3), 120-160 g/L(4), >160 g/L(5); female <60g/L(1), 60-90 g/L(2), 90-110(3), 110-150 g/L(4), >150 g/L(5)
X11	Position of tumor	lower segment thorax(1), middle segment in thorax(2), superior segment in thorax(3); Double primary cancer(4)
X12	Length of lesion	<3 cm(1), 3-5 cm(2), >5 cm(3)
X13	Fashion of resect	left posteroiateral incision(1), right thoracic and abdomen incision(2), Cervix, thoracic and abdominal incision(3), Thoracoabdominal approach(4), VATS(5), VATS + Laparoscope(6), laparotomy(7); The left carotid left chest(8)
X14	Organ reconstructed	stomach(1), Jejunum(2)
X15	Fashion of anastomose	Machanical(1), handwork(2)
X16	Position of anastomose	cervix(1), Superior to aortic arch(2), inferior to aortic arch(3), Right thorax(4)
X17	TNM stages of tumor	TisN0M0(0), T1aN0M0(1), T1bN0M0(2), T1bN1-2M0(3), T1bN3M0(4), T2N0M0(5), T2 N1M0(6), T2 N2 M0(7), T2 N3 M0(8), T3 N0M0(9), T3 N1M0(10), T3 N2M0(11), T3 N3M0(12), T4aN1M0(13),T4bN0-1M0(14), T-N-M1(15);
X18	Duration of operation	<3 h(1), >3 h(2)
X19	Range of Surgical resection	<4 cm(1), 4-6 cm(2), 7-8 cm(3), >8 cm(4)
X20	Vascular tumor thrombus	Negative(1), positive(2)
X21	Surgical stump	Negative(1), upper stump positive(2), lower stump positive(3)
X22	Pathological type	Squamous Cells Carcinoma- SqCa(1), adenocarcinoma(2), adenosquamous carcinoma (3), undifferentiated carcinoma or carcinosarcoma(4), other therioma(5)
X23	Degree of differentiation	Well-differentiated(G1)(1), moderately differentiated(G2)(2); poorly differentiated(G3)(3); undifferentiation(G4)(4);G1-G2(5), G2-G1(6), G3-G2(7), G2-G3(8), G2-G3/G1-G2(9), Gx(10)
X24	Extent of lymphnode dissection	0(1), 1-2(1), 3-6(2), >6(3)
X25	Year of operation	2002-2009年(1), 2010/2015-12(2)
X26	Intraoperative blood transfusion	Yes(1), No(2)
X27	Postoperative albumin	<35.0 g/L (1), 35.0-50.0 g/L(2), >50.0 g/L(3)
X28	Postoperative albumin	male <60 g/L(1), 60-90 g/L(2), 90-120(3), 120-160 g/L(4), >160 g/L(5); female <60 g/L(1), 60-90 g/L(2), 90-110(3), 110-150 g/L(4), >150 g/L(5)
X29	Amount of bleeding during operation	100-300 mL(1), 300-500 mL(2), 500-800 mL(3), 800-1000 mL(4), >1000 mL(5)
X30	Enteral nutrition time(the day after the operation	No(1); first day(2); 2nd day(3): 3th day(4); 4th day(5); 5th day(6); 6th day(7); 7th day(8); >7th day(9)
X31	ICU treatment time	No(1); 1 d(2); 2 d(3); 3 d(4); 4 d(5); 5 d(6); 6 d(7); 7 d(8); >7 d(9)
X32	arhythmia	Yes(1), No(2)
X33	Pneumonia、pulmonary infection	Yes(1), No(2)
X34	Urinary tract infections	Yes(1), No(2)
X35	Status asthmaticus	Yes(1), No(2)
X36	Severe pneumonia	Yes(1), No(2)
X37	Unilateral pleural effusion	Yes(1), No(2)
X38	Chest infection	Yes(1), No(2)
X39	Atelectasis	Yes(1), No(2)
X40	Bilateral pleural effusion	Yes(1), No(2)
X41	Pneumothorax	Yes(1), No(2)
X42	Hydropneumothorax	Yes(1), No(2)
X43	Pulmonary embolism	Yes(1), No(2)
X44	Abdominal infection、ascites	Yes(1), No(2)
X45	Infectious shock	Yes(1), No(2)
X46	Cardiogenic shock	Yes(1), No(2)
X47	Sudden cardiac death	Yes(1), No(2)
X48	Upper gastrointestinal bleeding	Yes(1), No(2)
X49	Hemorrhagic shock	Yes(1), No(2)
X50	MODS	Yes(1), No(2)
X51	Renal Failure	Yes(1), No(2)
X52	Electrolyte imbalance	Yes(1), No(2)
X53	Pyothorax	Yes(1), No(2)
X54	Anastomotic fistu	Yes(1), No(2)
X55	Chylopleura	Yes(1), No(2)
X56	Abdominal abscess	Yes(1), No(2)
X57	Central system failure	Yes(1), No(2)
X58	Failure of respiration	Yes(1), No(2)
X59	Circulatory failure	Yes(1), No(2)
X60	Respiratory failure and circulatory failure	Yes(1), No(2)
X61	Myocardial infarction	Yes(1), No(2)
X62	Hypoxic-ischemic syndrome	Yes(1), No(2)
X63	Innutrition、Hypoproteinem	Yes(1), No(2)
X64	Surgical wound infection	Yes(1), No(2)