Table 1.
Patient Characteristics for before SIPTW adjustment and after SIPTW adjustment
| Varible | Before SIPTW adjustment | After SIPTW adjustment a | |||||
|---|---|---|---|---|---|---|---|
| INHA | TIVA | P | INHA | TIVA | P | SMD b | |
| Sum of weight | Sum of weight | ||||||
| n = 307 | n = 114 | = 307.2 | = 113.6 | ||||
| Sex (%) | 0.667 | 0.995 | 0.001 | ||||
| Female | 131 (42.7) | 52 (45.6) | 133.9 (43.6) | 49.6 (43.6) | |||
| Male | 176 (57.3) | 62 (54.4) | 173.2 (56.4) | 64.0 (56.4) | |||
| Age | 57.00 | 57.00 | 0.430 | 57.00 | 57.00 | 0.772 | 0.018 |
| (median-IQR, year) | [51.0,63.0] | [49.25, 62.00] | [51.0,62.0] | [50.00, 62.00] | |||
| BMI | 23.44 | 22.86 | 0.305 | 23.41 | 23.04 | 0.898 | 0.066 |
| (median-IQR, kg/m2) | [21.34,25.81] | [21.43,25.16] | [21.26,25.65] | [21.63,25.94] | |||
| Smoke(%) | 0.538 | 0.995 | 0.001 | ||||
| No | 171 (55.7) | 68 (59.6) | 175.1 (57.0) | 64.8 (57.0) | |||
| Yes | 136 (44.3) | 46 (40.4) | 132.1 (43.0) | 48.8 (43.0) | |||
| Drink (%) | 0.858 | 0.824 | 0.024 | ||||
| No | 236 (76.9) | 86 (75.4) | 235.9 (76.8) | 88.4 (77.8) | |||
| Yes | 71 (23.1) | 28 (24.6) | 71.3 (23.2) | 25.2 (22.2) | |||
| Hypertension (%) | 1.000 | 0.940 | 0.008 | ||||
| No | 252 (82.1) | 93 (81.6) | 251.5 (81.9) | 92.7 (81.6) | |||
| Yes | 55 (17.9) | 21 (18.4) | 55.6 (18.1) | 20.9 (18.4) | |||
| Diabetes (%) | 0.760 | 0.858 | 0.019 | ||||
| No | 264 (86.0) | 96 (84.2) | 263.0 (85.6) | 98.0 (86.3) | |||
| Yes | 43 (14.0) | 18 (15.8) | 44.1 (14.4) | 15.6 (13.7) | |||
| Adjuvant treatment (%) | 0.832 | 0.901 | 0.014 | ||||
| No | 213 (69.4) | 81 (71.1) | 215.0 (70.0) | 80.2 (70.6) | |||
| Yes | 94 (30.6) | 33 (28.9) | 92.2 (30.0) | 33.4 (29.4) | |||
| Blood transfusion (%) | 0.355 | 0.861 | 0.020 | ||||
| No | 185 (60.3) | 75 (65.8) | 189.4 (61.7) | 68.9 (60.7) | |||
| Yes | 122 (39.7) | 39 (34.2) | 117.7 (38.3) | 44.6 (39.3) | |||
| Duration | 4.00 | 4.00 | 0.956 | 4.00 | 4.00 | 0.520 | 0.019 |
| (median-IQR, h) | [3.5, 4.5] | [3.5, 4.5] | [3.5, 4.5] | [3.5, 4.5] | |||
| ASA (%) | 0.290 | 0.996 | 0.009 | ||||
| I | 7 (2.3) | 4 (3.5) | 7.9 (2.6) | 2.8 (2.5) | |||
| II | 294 (95.8) | 105 (92.1) | 291.0 (94.8) | 107.7 (94.8) | |||
| III | 6(2.0) | 5 (4.4) | 8.2(2.7) | 3.1(2.7) | |||
| Tumour location (%) | 0.425 | 0.963 | 0.005 | ||||
| Head | 224 (73.0) | 78 (68.4) | 220.0(71.6) | 81.1(71.4) | |||
| Tail | 83 (27.0) | 36 (31.6) | 87.2(28.4) | 32.5(28.6) | |||
| TMN (%) | 0.372 | 0.986 | 0.019 | ||||
| I | 158 (51.5) | 51 (44.7) | 152.1 (49.5) | 56.2 (49.5) | |||
| II | 124 (40.4) | 50 (43.9) | 126.9 (41.3) | 46.4 (40.8) | |||
| III | 25 (8.1) | 13 (11.4) | 28.2 (9.2) | 11.0 (9.7) | |||
| Surgery type (%) | 0.660 | 0.999 | 0.005 | ||||
| Distal pancreatectomy | 89 (29.0) | 38 (33.3) | 93.0 (30.3) | 34.6 (30.5) | |||
| Pancreaticoduodenectomy | 2 (0.7) | 1 (0.9) | 2.2 (0.7) | 0.8 (0.7) | |||
| Other | 216 (70.4) | 75 (65.8) | 212.0 (69.0) | 78.1 (68.8) | |||
| Degree of differentiation(%) | 1.000 | 0.806 | 0.027 | ||||
| Poor | 115 (37.5) | 43 (37.7) | 114.3 (37.2) | 40.8 (35.9) | |||
| Well | 192 (62.5) | 71 (62.3) | 192.9 (62.8) | 72.8 (64.1) | |||
Abbreviations: IQR Inter-quartile range; Cancer stages: stage I: T1, N0, M0/T2, N0, M0/T1, N1, M0; stage II: T3, N0, M0/T4a, N1, M0/T3, N1, M0/T2, N2, M0/T1, N3, M0; stage III: T2, N3, M0/T3, N2, M0/T3, N3, M0/T4a, N2, M0/T4a, N3, M0/any T4b, any N, M0; stage IV: any T, any N, M1.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
Note:.a Because the weighted values were presented, the number of patients were not an integer
b Confounding factors were adjusted, SMD < 0.1, P > 0.05