Table I.
Demographic data of the two groups of patients and related indicators.
| Demographic | Short course group | Long course group | p-value |
|---|---|---|---|
| Mean age, yrs (SD)* | 64.58 (9.48) | 62.66 (11.04) | 0.345† |
| Sex, n * | 0.191‡ | ||
| Male | 38 | 19 | |
| Female | 26 | 22 | |
| Mean BMI, kg/m2 (SD)* | 24.48 (2.78) | 23.84 (2.29) | 0.231† |
| Affected joint * | 0.942‡ | ||
| Knee | 27 | 17 | |
| Hip | 37 | 24 | |
| Diabetes * | 0.963‡ | ||
| Yes | 8 | 5 | |
| None | 56 | 36 | |
| Hypertension * | 0.635‡ | ||
| Yes | 15 | 8 | |
| None | 49 | 33 | |
| Before stage I resection surgery | |||
| Sinus | 0.963‡ | ||
| Yes | 8 | 5 | |
| None | 56 | 36 | |
| Mean CRP, mg/l (SD) | 37.80 (37.62) | 38.57 (33.28) | 0.915† |
| Mean ESR, mm/h (SD) | 65.75 (30.80) | 61.27 (33.74) | 0.485† |
| Mean WBC, × 109/l (SD) | 7.44 (2.89) | 7.26 (2.91) | 0.763† |
| Mean PMN, % (SD) | 65.04 (17.44) | 61.37 (17.20) | 0.293† |
| Mean SF-WBC, × 106/l (SD) | 41,221.39 (66,175.04) | 41,918.48 (78,694.09) | 0.965† |
| Mean SF-PMN, % (SD) | 73.46 (17.69) | 70.74 (20.62) | 0.518† |
| Between stage I and stage II surgery | |||
| Duration of antibiotic, wks (IQR) | 6.0 (5.0 to 7.0) | 6.0 (6.0 to 7.5) | 0.125† |
| Antibiotic holiday, wks (IQR) | 9.0 (6.0 to 16.0) | 9.0 (6.5 to 15.0) | 0.677† |
| Before stage II reimplantation surgery | |||
| Mean CRP, mg/l (SD) | 8.14 (2.32) | 8.20 (1.89) | 0.900† |
| Mean ESR, mm/h (SD) | 11.58 (3.59) | 10.34 (3.17) | 0.074† |
| Mean WBC, × 109/l (SD) | 5.8 (1.33) | 6.09 (1.43) | 0.297† |
| Mean PMN, % (SD) | 59.52 (9.32) | 56.83 (9.24) | 0.152† |
| Mean SF-WBC, × 106/l (SD) | 838.07 (276.55) | 865.83 (266.29) | 0.612† |
| Mean SF-PMN, % (SD) | 46.78 (11.66) | 42.8 (8.56) | 0.065† |
*
This information was obtained before stage II reimplantation surgery.
†
Independent-samples t-test.
‡
Chi-squared test.
IQR, interquartile range; PMN, polymorphonuclear leucocyte; SD, standard deviation; SF, synovial fluid; WBC, white blood cell.