Does Hyponatremia Affect the Short-Term Outcomes of Colorectal Cancer Surgery: A Propensity Score Matching Analysis
Table 2
Baseline characteristics before and after PSM.
Characteristics
Before PSM
After PSM
Hyponatremia (184)
Normal sodium (6546)
value
Hyponatremia (184)
Normal sodium (184)
value
Na+
<0.01
<0.01
Age (year)
<0.01
0.810
Sex
0.501
0.831
Male
113 (61.4%)
3858 (58.9%)
113 (61.4%)
111 (60.3%)
Female
71 (38.6%)
2688 (41.1%)
71 (38.6%)
73 (39.7%)
BMI (kg/m2)
<0.01
0.522
Smoking
66 (35.9%)
2462 (37.6%)
0.631
66 (35.9%)
60 (32.6%)
0.510
Drinking
50 (27.2%)
2010 (30.7%)
0.305
50 (27.2%)
37 (20.1%)
0.111
Hypertension
51 (27.7%)
1630 (24.9%)
0.384
51 (27.7%)
54 (29.3%)
0.729
T2DM
37 (20.1%)
729 (11.1%)
<0.01
37 (20.1%)
44 (23.9%)
0.378
CHD
14 (7.6%)
298 (4.6%)
0.052
14 (7.6%)
17 (9.2%)
0.573
Surgical history
53 (28.8%)
1593 (24.3%)
0.164
53 (28.8%)
42 (22.8%)
0.190
Open surgery
101 (54.9%)
810 (12.4%)
<0.01
83 (45.1%)
76 (41.3%)
0.461
Tumor size
0.001
0.754
<5 cm
88 (47.8%)
3962 (60.5%)
88 (47.8%)
91 (49.5%)
≥5 cm
96 (52.2%)
2584 (39.5%)
96 (52.2%)
93 (50.5%)
Tumor location
<0.01
0.551
Colon
134 (72.8%)
3079 (47.0%)
134 (72.8%)
139 (75.5%)
Rectum
50 (27.2%)
3467 (53.0%)
50 (27.2%)
45 (24.5%)
Tumor stage
0.202
0.323
I
25 (13.6%)
1222 (18.7%)
25 (13.6%)
15 (8.2%)
II
77 (41.8%)
2630 (40.2%)
77 (41.8%)
78 (42.4%)
III
68 (37.0%)
2353 (35.9%)
68 (37.0%)
79 (42.9%)
IV
14 (7.6%)
341 (5.2%)
14 (7.6%)
12 (6.5%)
Note: Variables are expressed as the , (%), . Abbreviations: T2DM, type 2 diabetes mellitus; BMI, body mass index; PSM, propensity score matching; CHD, coronary heart disease.
