Table 2 The results of the univariate analysis
| Â | Statistics | OR | 95% CI | P value |
|---|---|---|---|---|
Sex, N (%) | Â | Â | Â | Â |
Male | 8492 (47.590%) | Ref. | Â | Â |
Female | 9352 (52.410%) | 0.652 | (0.540, 0.788) | <0.00001 |
Race, N (%) | Â | Â | Â | Â |
White | 12,701 (71.178%) | Ref. | Â | Â |
Asian | 523 (2.931%) | 0.757 | (0.401, 1.429) | 0.38976 |
African American | 1221 (6.843%) | 0.878 | (0.590, 1.306) | 0.51996 |
Unknown race | 3399 (19.048%) | 1.152 | (0.916, 1.450) | 0.22611 |
Age range, N (%) | Â | Â | Â | Â |
18–40 | 2836 (15.893%) | Ref. |  |  |
41–60 | 7412 (41.538%) | 2.730 | (1.706, 4.370) | 0.00003 |
61–80 | 7001 (39.234%) | 4.933 | (3.119, 7.803) | < 0.00001 |
> 81 | 595 (3.334%) | 14.629 | (8.708, 24.576) | < 0.00001 |
Diabetes, N (%) | Â | Â | Â | Â |
 No | 15,718 (88.086%) | Ref. |  |  |
Yes (Noninsulin-dependent) | 1343 (7.526%) | 1.538 | (1.129, 2.096) | 0.00632 |
Yes (Insulin-dependent) | 783 (4.388%) | 2.587 | (1.881, 3.557) | < 0.00001 |
Smoking status, N (%) | Â | Â | Â | Â |
No | 14,376 (80.565%) | Ref. | Â | Â |
Yes | 3468 (19.435%) | 1.130 | (0.900, 1.419) | 0.29262 |
Severe COPD, N (%) | Â | Â | Â | Â |
No | 17,028 (95.427%) | Ref. | Â | Â |
Yes | 816 (4.573%) | 2.496 | (1.830, 3.405) | < 0.00001 |
CHF, N (%) | Â | Â | Â | Â |
No | 17,786 (99.675%) | Ref. | Â | Â |
Yes | 58 (0.325%) | 7.157 | (3.494, 14.661) | < 0.00001 |
Hypertension, N (%) | Â | Â | Â | Â |
No | 10,933 (61.270%) | Ref. | Â | Â |
Yes | 6911 (38.730%) | 2.246 | (1.859, 2.713) | < 0.00001 |
Renal failure, N (%) | Â | Â | Â | Â |
No | 17,830 (99.922%) | Ref. | Â | Â |
Yes | 14 (0.078%) | 10.509 | (2.922, 37.800) | 0.00032 |
Dialysis | Â | Â | Â | Â |
No | 17,787 (99.681%) | Ref. | Â | Â |
Yes | 57 (0.319%) | 6.348 | (2.989, 13.483) | < 0.00001 |
Disseminated cancer, N (%) | Â | Â | Â | Â |
No | 13,919 (78.004%) | Ref. | Â | Â |
Yes | 3925 (21.996%) | 2.835 | (2.347, 3.425) | < 0.00001 |
Steroid use, N (%) | Â | Â | Â | Â |
No | 15,135 (84.818%) | Ref. | Â | Â |
Yes | 2709 (15.182%) | 2.278 | (1.850, 2.806) | < 0.00001 |
Preoperative systemic sepsis N (%) | Â | Â | Â | Â |
No | 17,175 (96.251%) | Ref. | Â | Â |
SIRS | 658 (3.688%) | 2.557 | (1.824, 3.585) | < 0.00001 |
Septic Shock | 11 (0.062%) | 9.019 | (1.943, 41.874) | 0.00499 |
Na | Â | Â | Â | Â |
Normal serum Na group (Na ≥ 135, < 146) | 15,925 (89.246%) | Ref. |  |  |
Hyponatremia group (Na < 135) | 1715 (9.611%) | 2.372 | (1.868, 3.012) | < 0.00001 |
Hypernatremia group (Na ≥ 146) | 204 (1.143%) | 2.500 | (1.349, 4.631) | 0.00359 |
WBC | 9.524 ± 4.460 | 1.072 | (1.055, 1.089) | < 0.00001 |
HCT | 40.291 ± 4.806 | 0.924 | (0.909, 0.940) | < 0.00001 |
PLT | 244.222 ± 76.614 | 0.998 | (0.997, 0.999) | 0.00144 |
BUN | 17.348 ± 8.155 | 1.043 | (1.035, 1.050) | < 0.00001 |
Cr | 0.863 ± 0.450 | 1.241 | (1.114, 1.383) | 0.00009 |
BMI | 28.728 ± 6.624 | 0.987 | (0.972, 1.002) | 0.08094 |