Case Control Study
Copyright ©The Author(s) 2024.
World J Orthop. Jun 18, 2024; 15(6): 539-546
Published online Jun 18, 2024. doi: 10.5312/wjo.v15.i6.539
Table 2 Showing patient demographics after matching, n (%)

Irrigation and debridement within 8 hours
Irrigation and debridement after 8 hours
P value
Age (years): Median (Q1, Q3)14 (11, 16)15 (12, 16)0.063
Race
American Indian1 (0.6)0 (0)
Asian4 (2.3)1 (0.6)0.371
Black26 (14.8)37 (21)0.153
Pacific islander2 (1.1)0 (0)
White121 (68.8)120 (68.2)1
Other19 (10.8)16 (9.1)0.71
Sex
Female54 (30.7)54 (30.7)1
Male122 (69.3)122 (69.3)
Injury severity score9.590.748
Glasgow coma scale15151
Mechanism of injury
Fall33 (18.8)40 (22.7)
Machinery0 (0)0 (0)
MVT occupant35 (19.9)33 (18.8)
MVT motorcyclist8 (4.5)7 (4)
MVT pedal cyclist4 (2.3)5 (2.8)
MVT pedestrian29 (16.5)40 (22.7)
MVT other8 (4.5)6 (3.4)
Pedal cyclist, other3 (1.7)3 (1.7)
Pedestrian, other2 (1.1)3 (1.7)
Transport, other33 (18.8)20 (11.4)
Natural/ environment, other0 (0)1 (0.6)
Overexertion4 (2.3)5 (2.8)
Struck by, against15 (8.5)11 (6.2)
Other specified and classifiable2 (1.1)2 (1.1)
Antibiotic therapy (hours)0.3 (0-0.87)0.2 (0-0.88)0.428
Comorbidities
Congenital abnormalities0 (0)3 (1.7)
Mental health disorder3 (1.7)3 (1.7)1
Substance abuse1 (0.6)1 (0.6)1
Bleeding0 (0)1 (0.6)
Abbreviated injury score of 3-5
Brain4 (2.3)8 (4.5)0.386
Spine2 (1.1)0 (0)
Chest7 (4)11 (6.2)0.48
Abdomen4 (2.3)4 (2.3)1
Upper extremity0 (0)1 (0.6)
Lower extremity164 (93.2)152 (86.4)0.067