. 2023 Mar 2;23:66. doi: 10.1186/s12871-023-02023-1

Table 1.

Patient characteristics for before SIPTW adjustment and after SIPTW adjustment

^Variable	^{BEFORE SIPTW ADJUSTMENT}				^{AFTER SIPTW ADJUSTMENT}
^Group	^{INHA (n=216)}	^{TIVA (n=147)}	^P	^SMD	^{INHA (n=215.8)}	^{TIVA (n=147.8)}	^P	^SMD
^Age	⁵⁹	⁵⁷	^0.210	^0.114	⁵⁹	⁵⁸	^0.821	^0.006
^{(Median [IQR] year)}	^{[53.00, 63.25]}	^{[53.00, 62.00]}			^{[53.00, 63.00]}	^{[53.00, 63.00]}
^{Adjuvant treatment (%)}			^0.292	^0.124			^0.897	^0.015
^No	^{125 (57.9)}	^{76 (51.7)}			^{117.5 (54.4)}	^{79.3 (53.7)}
^Yes	^{91 (42.1)}	^{71 (48.3)}			^{98.4 (45.6)}	^{68.5 (46.3)}
^{ASA (%)}			^0.513	^0.123			^0.990	^0.016
^I	^{38 (17.6)}	^{21 (14.3)}			^{35.3 (16.4)}	^{23.3 (15.8)}
^Ii	^{158 (73.1)}	^{108 (73.5)}			^{158.5 (73.4)}	^{109.5 (74.1)}
^Iii	^{20 ( 9.3)}	^{18 (12.2)}			^{22.0 (10.2)}	^{15.0 (10.2)}
^BMI	^22.1	^22.5	^0.717	^0.076	^22.1	^22.1	^0.525	^0.021
^{(Median [IQR] kg/m2)}	^{[20.10, 24.83]}	^{[20.30, 24.20]}			^{[20.20, 24.99]}	^{[20.22, 24.10]}	^0.525	^0.021
^{Blood transfusion (%)}			^0.310	^0.145			^0.774	^0.039
^No	^{206 (95.4)}	^{144 (98.0)}			^{207.8 (96.3)}	^{141.2 (95.5)}
^Yes	^{10 ( 4.6)}	^{3 ( 2.0)}			^{8.0 ( 3.7)}	^{6.6 ( 4.5)}
^{Cardiovascular disease (%)}			^1.000	^0.031			^0.963	^0.005
^No	^{209 (96.8)}	^{143 (97.3)}			^{209.3 (97.0)}	^{143.5 (97.1)}
^Yes	^{7 ( 3.2)}	^{4 ( 2.7)}			^{6.5 ( 3.0)}	^{4.3 ( 2.9)}
^{Cerebrovascular disease (%)}			^0.476	^0.099			^0.934	^0.009
^No	^{205 (94.9)}	^{136 (92.5)}			^{203.3 (94.2)}	^{138.9 (94.0)}
^Yes	^{11 ( 5.1)}	^{11 ( 7.5)}			^{12.5 ( 5.8)}	^{8.9 ( 6.0)}
^{Drink (%)}			^0.401	^0.103			^0.880	^0.018
^No	^{75 (34.7)}	^{44 (29.9)}			^{70.4 (32.6)}	^{49.4 (33.4)}
^Yes	^{141 (65.3)}	^{103 (70.1)}			^{145.5 (67.4)}	^{98.4 (66.6)}
^{Diabetes (%)}			^0.114	^0.192			^0.657	^0.056
^No	^{212 (98.1)}	^{139 (94.6)}			^{205.7 (95.3)}	^{142.5 (96.4)}
^Yes	^{4 ( 1.9)}	^{8 ( 5.4)}			^{10.1 ( 4.7)}	^{5.3 ( 3.6)}
^{Duration of anesthesia}	^6.1	^6.3	^0.189	^0.178	^6.23	^6.2	^0.886	^0.002
^{(Median [IQR] h)}	^{[5.00, 7.00]}	^{[5.20, 7.35]}			^{[5.00, 7.00]}	^{[5.00, 7.30]}	^0.886	^0.002
^{Degree of differentiation (%)}			^0.777	^0.044			^0.884	^0.017
^Poor	^{165 (76.4)}	^{115 (78.2)}			^{165.4 (76.6)}	^{114.3 (77.3)}
^Well	^{51 (23.6)}	^{32 (21.8)}			^{50.5 (23.4)}	^{33.5 (22.7)}
^{Hypertension (%)}			^0.182	^0.157			^0.974	^0.004
^No	^{186 (86.1)}	^{118 (80.3)}			^{181.0 (83.9)}	^{124.2 (84.0)}
^Yes	^{30 (13.9)}	^{29 (19.7)}			^{34.8 (16.1)}	^{23.7 (16.0)}
^{N (%)}			^0.009	^0.329			^0.985	^0.020
^N0	^{117 (54.2)}	^{61 (41.5)}			^{103.7 (48.0)}	^{70.6 (47.8)}
^N1	^{58 (26.9)}	^{62 (42.2)}			^{72.2 (33.4)}	^{48.7 (32.9)}
^N2	^{41 (19.0)}	^{24 (16.3)}			^{40.0 (18.5)}	^{28.5 (19.3)}
^{Postoperative hospital stay}	¹⁶	¹⁵	^0.906	^0.038	¹⁶	¹⁵	^0.921	^0.010
^{(Median [IQR] d)}	^{[14.00, 18.25]}	^{[14.00, 18.50]}			^{[14.00, 18.00]}	^{[14.00, 18.38]}	^0.921	^0.010
^{Preoperative HB}	^146.5	^145.1	^0.909	^0.035	^146.64	¹⁴⁵	^0.761	^0.023
^{(Median [IQR] g/l)}	^{[135.93, 154.00]}	^{[137.00, 154.40]}			^{[136.23, 154.21]}	^{[136.44, 154.76]}	^0.761	^0.023
^{Pathological classification (%)}			^0.590	^0.100			^0.636	^0.051
^{Adenocarcinoma}	^{6 ( 2.8)}	^{2 ( 1.4)}			^{4.5 ( 2.1)}	^{2.1 ( 1.4)}
^{Squamous cell carcinoma}	^{210 (97.2)}	^{145 (98.6)}			^{211.3 (97.9)}	^{145.7 (98.6)}
^{Sex (%)}			^1.000	^0.003			^0.931	^0.009
^Female	^{6 ( 2.8)}	^{4 ( 2.7)}			^{5.3 ( 2.4)}	^{3.4 ( 2.3)}
^Male	^{210 (97.2)}	^{143 (97.3)}			^{210.6 (97.6)}	^{144.4 (97.7)}
^{Smoke (%)}			^0.333	^0.116			^0.919	^0.012
^No	^{84 (38.9)}	^{49 (33.3)}			^{78.0 (36.1)}	^{52.6 (35.6)}
^Yes	^{132 (61.1)}	^{98 (66.7)}			^{137.8 (63.9)}	^{95.2 (64.4)}
^{The length of the operation}	^5.2	^5.3	^0.160	^0.194	^5.2	^5.11	^0.756	^0.004
^{(Median [IQR] h)}	^{[4.07, 6.10]}	^{[3.95, 6.40]}			^{[4.10, 6.20]}	^{[3.80, 6.17]}	^0.756	^0.004
^{Surgical type (%)}			^0.835	^0.095			^0.988	^0.039
^{Lvor lewis}	^{86 (39.8)}	^{58 (39.5)}			^{83.6 (38.7)}	^{54.8 (37.1)}
^Mckeown	^{55 (25.5)}	^{37 (25.2)}			^{54.7 (25.3)}	^{38.4 (26.0)}
^Sweet	^{74 (34.3)}	^{50 (34.0)}			^{76.3 (35.4)}	^{53.5 (36.2)}
^{Thoracoabdominal incision}	^{1 ( 0.5)}	^{2 ( 1.4)}			^{1.2 ( 0.6)}	^{1.1 ( 0.7)}
^{Tumor location (%)}			^0.739	^0.083			^0.956	^0.035
^{Lower esophagus}	^{96 (44.4)}	^{67 (45.6)}			^{96.5 (44.7)}	^{64.0 (43.3)}
^{Middle esophagus}	^{105 (48.6)}	^{67 (45.6)}			^{100.7 (46.6)}	^{69.9 (47.3)}
^{Upper esophagus}	^{15 ( 6.9)}	^{13 ( 8.8)}			^{18.7 ( 8.6)}	^{14.0 ( 9.4)}
^{T (%)}			^0.884	^0.086			^0.986	^0.040
^T1	^{51 (23.6)}	^{32 (21.8)}			^{48.6 (22.5)}	^{34.6 (23.4)}
^T2	^{40 (18.5)}	^{32 (21.8)}			^{44.1 (20.4)}	^{31.7 (21.4)}
^T3	^{121 (56.0)}	^{80 (54.4)}			^{119.5 (55.4)}	^{79.4 (53.7)}
^T4	^{4 ( 1.9)}	^{3 ( 2.0)}			^{3.6 ( 1.7)}	^{2.1 ( 1.5)}
^{TNM (%)}			^0.261	^0.177			^0.999	^0.004
^I	^{46 (21.3)}	^{23 (15.6)}			^{39.9 (18.5)}	^{27.5 (18.6)}
^Ii	^{75 (34.7)}	^{48 (32.7)}			^{72.0 (33.4)}	^{49.2 (33.3)}
^Iii	^{95 (44.0)}	^{76 (51.7)}			^{104.0 (48.2)}	^{71.1 (48.1)}
^{Total hospital stay}	²⁴	²⁴	^0.627	^0.029	²⁴	²⁴	^0.567	^0.017
^{(Median [IQR] d)}	^{[21.00, 28.00]}	^{[21.00, 28.50]}			^{[21.00, 27.04]}	^{[21.00, 29.00]}	^0.567	^0.017

Abbreviations: IQR Inter-quartile range, ASA American society of anesthesiologists, BMI Body mass index, INHA Inhalational anesthesia, TIVA Total intravenous anesthesia, SIPTW Stabilized inverse probability of treatment weighting, SMD Standardized mean difference