Table 2.

Postoperative antibiotic concentration

	Study group	Control group	P-value
Vancomycin concentration (M ± SD)
Day 1	273.26 ± 31.93	260.85 ± 11.88	0.156
Day 2	214.39 ± 47.19	199.90 ± 41.68	0.365
Day 3	165.39 ± 57.49	173.02 ± 35.36	0.654
Day 4	131.92 ± 57.28	122.16 ± 47.73	0.604
Day 5	110.13 ± 66.78	98.52 ± 40.31	0.556
Change	163.20 ± 77.05	162.39 ± 36.31	0.917
Meropenem concentration (M ± SD)
Day 1	134.04 ± 20.59	126.61 ± 14.56	0.248
Day 2	63.99 ± 27.28	56.84 ± 16.36	0.375
Day 3	18.09 ± 5.88	19.35 ± 6.86	0.581
Day 4	11.78 ± 2.79	10.93 ± 1.88	0.318
Day 5	10.27 ± 3.26	9.34 ± 8.40	0.682
Change	123.78 ± 21.04	117.27 ± 19.38	0.548