TABLE 2.
Baseline characteristics of the study population according to PLR thresholds.
| Variables | Total (n = 1002) | PLR < 0.88 (n = 325) | 0.88 ≤ PLR < 1.73 (n = 346) | PLR ≥ 1.73 (n = 331) | P |
| Age, mean ± SD | 65.09 ± 10.60 | 64.69 ± 10.35 | 64.67 ± 11.50 | 65.93 ± 9.81 | 0.216 |
| Gender, n (%) | 0.052 | ||||
| Female | 404 (40.32) | 120 (36.92) | 133 (38.44) | 151 (45.62) | |
| Male | 598 (59.68) | 205 (63.08) | 213 (61.56) | 180 (54.38) | |
| BMI (kg/m2), mean ± SD | 29.88 ± 5.54 | 30.05 ± 5.61 | 29.48 ± 5.16 | 30.13 ± 5.83 | 0.246 |
| WBC (K/uL), mean ± SD | 12.82 ± 5.88 | 14.22 ± 6.22 | 11.88 ± 5.09 | 12.43 ± 6.08 | <0.001 |
| Hemoglobin (g/dL), mean ± SD | 10.67 ± 2.18 | 10.37 ± 1.91 | 11.11 ± 2.27 | 10.51 ± 2.27 | <0.001 |
| Sodium (mEq/L), mean ± SD | 138.88 ± 4.66 | 139.05 ± 4.29 | 139.02 ± 4.96 | 138.55 ± 4.69 | 0.303 |
| Potassium (mEq/L), mean ± SD | 4.29 ± 0.57 | 4.34 ± 0.56 | 4.26 ± 0.54 | 4.28 ± 0.62 | 0.183 |
| Calciumtotal (mg/dL), mean ± SD | 8.45 ± 0.71 | 8.37 ± 0.69 | 8.50 ± 0.68 | 8.47 ± 0.75 | 0.058 |
| Glucose (mg/dL), mean ± SD | 145.97 ± 60.63 | 135.55 ± 48.93 | 144.26 ± 63.75 | 157.98 ± 65.55 | <0.001 |
| PT (sec), mean ± SD | 15.46 ± 7.49 | 15.31 ± 4.59 | 14.94 ± 5.93 | 16.17 ± 10.59 | 0.093 |
| Creatinine (mg/dL), mean ± SD | 1.47 ± 1.42 | 1.31 ± 1.20 | 1.40 ± 1.37 | 1.70 ± 1.63 | <0.001 |
| HT, n (%) | 498 (49.70) | 166 (51.08) | 185 (53.47) | 147 (44.41) | 0.052 |
| DM, n (%) | 429 (42.81) | 129 (39.69) | 156 (45.09) | 144 (43.50) | 0.352 |
| HF, n (%) | 288 (28.74) | 97 (29.85) | 82 (23.70) | 109 (32.93) | 0.026 |
| MI, n (%) | 166 (16.57) | 53 (16.31) | 54 (15.61) | 59 (17.82) | 0.731 |
| CKD, n (%) | 228 (22.75) | 64 (19.69) | 73 (21.10) | 91 (27.49) | 0.039 |
| ARF, n (%) | 390 (38.92) | 113 (34.77) | 121 (34.97) | 156 (47.13) | <0.001 |
| Pneumonia, n (%) | 216 (21.56) | 47 (14.46) | 74 (21.39) | 95 (28.70) | <0.001 |
| HLP, n (%) | 566 (56.49) | 199 (61.23) | 212 (61.27) | 155 (46.83) | <0.001 |
| COPD, n (%) | 141 (14.07) | 37 (11.38) | 42 (12.14) | 62 (18.73) | 0.011 |
| Sepsis, n (%) | 482 (48.10) | 144 (44.31) | 135 (39.02) | 203 (61.33) | <0.001 |
| Ventilation, n (%) | 762 (76.05) | 281 (86.46) | 236 (68.21) | 245 (74.02) | <0.001 |
| Hospday, mean ± SD | 13.56 ± 14.02 | 12.88 ± 12.73 | 12.86 ± 13.59 | 14.97 ± 15.52 | 0.084 |
| Dead, n (%) | 125 (12.48) | 24 (7.38) | 31 (8.96) | 70 (21.15) | <0.001 |
| PLR, mean ± SD | 1.88 ± 2.34 | 0.61 ± 0.18 | 1.25 ± 0.24 | 3.79 ± 3.30 | <0.001 |
WBC, white blood cell; BMI, body mass index; PT, prothrombin time; HT, hypertension; DM, diabetes mellitus; HF, heart failure; MI, myocardial infarction; HLP, hyperlipidemia; Hospday, length of hospital stay; CKD, chronic kidney disease; ARF, acute renal failure; Ventilation, mechanical ventilation; COPD, chronic obstructive pulmonary disease; PLR; platelet(105/ul)-to-lymphocyte(103/ul) ratio. Bold values indicate P < 0.05 and are statistically significant.