Table 2 Investigated predictors of bacteremia within blood culture positives and negatives
From: Shaking chills and high body temperature predict bacteremia especially among elderly patients
Total | Age 18 to 79 | Age above 80 | |||||||
|---|---|---|---|---|---|---|---|---|---|
Blood culture positives | Negatives | p value | Blood culture positives | Negatives | p value | Blood culture positives | Negatives | p value | |
N = 90 | N = 276 | N = 45 | N = 147 | N = 45 | N = 129 | ||||
Male sex | 28 (31.1%) | 106 (38.4%) | 0.212 | 16 (35.5%) | 73 (49.6%) | 0.097 | 12 (26.6%) | 33 (25.5%) | 0.886 |
History | |||||||||
Shaking chills | 47 (52.2%) | 70 (25.3%) | 0.000* | 26 (57.7%) | 51 (34.6%) | 0.006* | 21 (46.6%) | 19 (14.7%) | 0.000* |
Prior antibiotics use | 6 (6.6%) | 64 (23.1%) | 0.000* | 1 (2.2%) | 35 (23.8%) | 0.000* | 5 (11.1%) | 29 (22.4%) | 0.071 |
Vital signs (mean±SD) | |||||||||
Blood pressure systolic (mmHg) | 122 ± 26 | 119 ± 24 | 0.3347 | 118 ± 25 | 117 ± 24 | 0.8815 | 126 ± 26 | 121 ± 24 | 0.2523 |
Blood pressure diastolic (mmHg) | 67 ± 13 | 66 ± 13 | 0.2877 | 67 ± 13 | 66 ± 12 | 0.7516 | 68 ± 12 | 65 ± 14 | 0.2456 |
Pulse rate (/min) | 104 ± 20 | 101 ± 20 | 0.1877 | 107 ± 18 | 106 ± 21 | 0.6532 | 101 ± 21 | 95 ± 18 | 0.0929 |
Respiratory rate (/min) | 24 ± 6.4 | 22 ± 5.0 | 0.0078* | 22 ± 5.5 | 22 ± 5.0 | 0.4752 | 26 ± 6.6 | 23 ± 4.8 | 0.0033* |
Body temperature (°C) | 38.5 ± 1.0 | 37.8 ± 0.9 | 0.0000* | 38.3 ± 1.0 | 38.0 ± 0.9 | 0.0393* | 38.6 ± 1.1 | 37.7 ± 0.9 | 0.0000* |
Laboratory markers (median [IQR]) | |||||||||
White blood count (/μl) | 11000[5900] | 11000[5500] | 0.2259 | 12000[5100] | 11000[5100] | 0.1381 | 10000[4000] | 10800[4800] | 0.7554 |
C-reactive protein (mg/dl) | 7.0[10.2] | 5.7[10] | 0.1897 | 10[12.2] | 7.0[10.2] | 0.4398 | 6.0[9.2] | 4.1[8.5] | 0.1775 |