All | Pyogenic spondylitis | Psoas abscess | p value | |
---|---|---|---|---|
n = 126 | n = 72 | n = 54 | ||
Variables | n (%) or mean ± SD or median [IQR] | |||
Male | 69 (55) | 38 (53) | 31 (57) | 0.61 |
Age, year | 72 ± 11 | 74 ± 10 | 70 ± 11 | 0.07 |
Length of stay, days | 60 [39–97] | 60 [41–106] | 58 [36–94] | 0.06 |
In-hospital death | 11 (8.7) | 3 (4.1) | 8 (15) | 0.05 |
Invasive interventions | 54 (43) | 25 (35) | 29 (54) | 0.045 |
Percutaneous drainage | 50 (40) | 21 (29) | 29 (54) | 0.006 |
Operation | 6 (4.8) | 5 (6.9) | 1 (1.9) | 0.24 |
Laminectomy | 4 (3.2) | 4 (5.6) | 0 (0.0) | 0.13 |
Surgical drainage | 2 (1.6) | 1 (1.4) | 1 (1.9) | 1.00 |
Days after admission to diagnosis, day | 0 [0–11] | 0 [0–5] | 2 [0–20] | 0.0167 |
Days after admission to diagnosis, day ≥ 14 days | 28 (22) | 10 (14) | 18 (33) | 0.016 |
Antibiotics use, days | 28 [17–42] | 28 [18–42] | 30 [15–42] | 0.79 |
Over 6 weeks | 38 (30) | 23 (32) | 15 (28) | 0.70 |
Symptoms | ||||
Lumbago or back pain | 72 (57) | 49 (68) | 23 (43) | 0.004 |
Fever | 51 (40) | 32 (44) | 19 (35) | 0.30 |
Shock | 11 (8.7) | 2 (2.8) | 9 (17) | 0.009 |
Classification | ||||
Type A* | – | 33 (46) | – | – |
Type B* | – | 18 (25) | – | – |
Type C* | – | 21 (29) | – | – |
Multiple abscesses | – | – | 30 (56) | – |
Co-morbidities | 102 (81) | 56 (78) | 46 (85) | 0.36 |
Hospitalized for comorbidity | 57 (45) | 27 (38) | 30 (56) | 0.044 |
Hospitalized for other infections | 17 (13) | 6 (8.3) | 11 (20) | 0.07 |
Bacterial detection | 84 (67) | 45 (63) | 39 (72) | 0.34 |
Gram-positive cocci | 63 (50) | 35 (49) | 28 (52) | 0.72 |
Gram-negative rods | 19 (15) | 8 (11) | 11 (20) | 0.15 |
Mycobacterium | 2 (1.6) | 2 (2.8) | 0 (0.0) | 0.51 |
Vital signs | ||||
SBP, mmHg | 132 ± 31 | 137 ± 28 | 127 ± 35 | 0.10 |
DBP, mmHg | 75 ± 18 | 78 ± 15 | 70 ± 20 | 0.0151 |
Body temperature, °C | 37.3 ± 1.1 | 37.4 ± 1.1 | 37.2 ± 1.1 | 0.27 |
Heart rate, /min | 89 ± 19 | 88 ± 19 | 89 ± 19 | 0.30 |
Laboratory data | ||||
WBC, × 102/μL | 113 ± 51 | 106 ± 41 | 122 ± 61 | 0.07 |
Hb, g/dL | 11.3 ± 2.2 | 11.7 ± 1.8 | 10.7 ± 2.5 | 0.0116 |
Plt, × 104/μL | 22.8 ± 11.8 | 24.8 ± 11.5 | 20.0 ± 11.9 | 0.0234 |
CRP, mg/dL | 11.1 ± 9.8 | 9.4 ± 8.4 | 13.3 ± 11.0 | 0.0233 |
T-bil, mg/dL | 0.8 ± 0.5 | 0.8 ± 0.4 | 0.8 ± 0.5 | 0.75 |
Alb, g/dL | 3.3 ± 0.6 | 3.4 ± 0.6 | 3.1 ± 0.7 | 0.0045 |
AST, IU/L | 33 ± 30 | 31 ± 28 | 37 ± 31 | 0.26 |
ALT, IU/L | 26 ± 23 | 26 ± 25 | 24 ± 19 | 0.73 |
LDH, IU/L | 261 ± 123 | 239 ± 88 | 290 ± 153 | 0.0233 |
Blood sugar, mg/dL | 152 ± 71 | 141 ± 66 | 165 ± 76 | 0.06 |
BUN, mg/dL | 25.6 ± 22.8 | 20.9 ± 10.6 | 32.0 ± 32.0 | 0.0069 |
Cr, mg/dL | 1.3 ± 1.7 | 1.0 ± 0.8 | 1.7 ± 2.5 | 0.0178 |
Na, mmol/L | 137.0 ± 5.0 | 137.2 ± 5.1 | 136.7 ± 4.8 | 0.57 |
K, mmol/L | 4.0 ± 0.6 | 4.0 ± 0.5 | 3.9 ± 0.7 | 0.42 |