Table 1 Baseline and Procedural Characteristics, by Surgical Antimicrobial Prophylaxis Administration (Before Incision / After Cord Clamping)
Before incision | After cord clamping | p | |
|---|---|---|---|
n | 26,405 | 29,496 | |
Age (%) | 0.043 | ||
< 30 years | 7891 (29.9) | 8902 (30.2) | |
30–40 years | 16,631 (63.0) | 18,346 (62.2) | |
> 40 years | 1883 (7.1) | 2248 (7.6) | |
BMI in kg/m2, median [IQR])a | 28.0 [25.2, 31.6] | 27.3 [24.2, 30.9] | < 0.001 |
SAP agent (%) | < 0.001 | ||
Amoxicillin + Clavulanate | 3601 (13.6) | 1770 (6.0) | |
Cefazolin | 9081 (34.4) | 9073 (30.8) | |
Ceftriaxone | 782 (3.0) | 5117 (17.3) | |
Cefuroxime | 12,941 (49.0) | 13,536 (45.9) | |
Minutes between SAP administration and incision | −15 [−25, −9] | 10 [5, 15] | < 0.001 |
Elective surgery = yes (%) | 13,458 (51.0) | 14,820 (50.2) | 0.089 |
ASA Score (%) | < 0.001 | ||
ASA 1 | 4427 (16.8) | 6862 (23.3) | |
ASA 2 | 20,229 (76.6) | 20,648 (70.0) | |
ASA 3/4/5 | 1401 (5.3) | 1514 (5.1) | |
NA | 348 (1.3) | 472 (1.6) | |
Contaminated wound = yes (%) | 5724 (21.7) | 6440 (21.8) | 0.663 |
Procedure duration in minutes (median [IQR])b | 38 [29, 49] | 37 [29, 48] | < 0.001 |
Hospital bed size (%) | < 0.001 | ||
< 200 | 12,328 (46.7) | 17,588 (59.6) | |
200–499 | 11,497 (43.5) | 5757 (19.5) | |
500+ | 2580 (9.8) | 6151 (20.9) | |
Procedure after January 1, 2014 = yes (%) | 18,081 (68.5) | 9612 (32.6) | < 0.001 |