Supplementary Table. Lower Extremity Musculoskeletal Injury Diagnostic Codes Lower Extremity Conditions ICD-9 Location Foot Joint Derangements 718.08-718.68 Tendonitis 726.70 Fibromatosis, plantar fascial 728.71 Stress fracture 733.94 Fracture 825-826 Dislocation 838 Sprain/strain, foot (not otherwise specified) 845.10 Sprain/strain, foot tarsometatarsal 845.11 Sprain foot metatarsophalangeal 845.12 Sprain/strain, interphalangeal toe 845.13 Sprain/strain, foot (not elsewhere classified) 845.19 Hip Osteoarthritis 715.15-715.95 Joint derangements 718.05-718.65 Sacroiliitis (not elsewhere classified) 720.2 Enthesopathy, hip 726.5 Stress fracture, pelvis 733.98 Fracture 820 Dislocation 835 Sprain/strain 843 Knee Internal derangement of knee 717-717.9 Recurrent dislocation 718.3 Tendonitis 726.6 Enthesopathy (not otherwise specified) 726.60 Tendinitis, pes anserinus 726.61 Bursitis, tibial collateral ligament 726.62 Bursitis, fibular collateral ligament 726.63 Tendinitis, patellar 726.64 Bursitis, prepatellar 726.65 Enthesopathy, knee (not elsewhere classified) 726.69 Plica syndrome 727.83 Fracture 822 Dislocation 836 Tears 836.0, 836.1, 836.2 Patellar dislocations 836.3, 836.4 Dislocations of specific knee anatomy 836.5, 836.6 Sprain, knee, lateral collateral ligament 844.0 Sprain, knee, medial collateral ligament 844.1 Sprain/strain, cruciate ligament knee 844.2 Sprain, knee, superior tibiofibular 844.3 Sprain/strain, knee/leg (not elsewhere classified) 844.8 Sprain/strain, knee/leg (not otherwise classified) 844.9 Lower leg and Osteoarthritis 715.16, 715.17- ankle 715.96, 715.97 Arthropathy (not elsewhere classified) 716.86 Arthropathy (not elsewhere classified) 716.87 Arthropathy (not otherwise specified) 716.96 Arthropathy (not otherwise specified) 716.97 Effusion, joint 719.06 Effusion, joint 719.07 Pain in joint 719.46 Pain in joint 719.47 Disorder, joint (not elsewhere classified) 719.86 Disorder, joint (not elsewhere classified) 719.87 Disorder, joint (not otherwise specified) 719.96 Disorder, joint (not otherwise specified) 719.97 Enthesopathy, ankle (not otherwise specified) 726.70 Tendinitis, Achilles 726.71 Tendinitis, tibialis 726.72 Enthesopathy, ankle (not elsewhere classified) 726.79 Synovitis and tenosynovitis 727.06 Fracture, pathologic, tibia/fibula 733.16 Bone stress injury of the tibia or fibula 733.93 Fracture 823-824 Sprain/strain, ankle (not otherwise specified) 845.00 Sprain/strain, ankle deltoid 845.01 Sprain/strain, ankle calcaneofibular 845.02 Sprain, ankle distal tibiofibular 845.03 Sprain/strain, ankle (not elsewhere classified) 845.09 Joint derangements 718.06, 718.07- 718.66, 718.67 Tendonitis 726.71, 726.72, 726.73, 726.79 Dislocation 836 Sprain/strain 845.0 Upper leg and Arthropathy (not elsewhere classified) 716.85 thigh Arthropathy (not otherwise classified) 716.95 Pain in joint 719.45 Symptoms, joint (not elsewhere classified) 719.65 Disorder, joint (not elsewhere classified) 719.85 Disorder, joint (not otherwise classified) 719.95 Fracture, pathologic, femur (not elsewhere 733.14 classified) Fracture, pathologic, femur (not otherwise 733.15 classified) Stress fracture, femoral neck (not otherwise 733.96 classified) Stress fracture, shaft of femur (not otherwise 733.97 classified) Fracture 821 Sprain/strain, iliofemoral 843.0 Sprain/strain, ischiocapsular 843.1 Sprain/strain, hip/thigh (not elsewhere classified) 843.8 Sprain/strain, hip/thigh (not otherwise classified) 843.9 Diagnoses and ICD-9 codes derived from Hruby et al. BMI and Lower Extremity Injury in the U.S. Army Soldiers, 2001-2011.