Distribution of causes in pediatric bone patients from 2006 to 2021. Legend: CMER (22, 1.94%) consists of BI (3 cases), CY (7 cases), PCP (5 cases), and OUR (7 cases). Birth injury (BI); excise machine injury (EM), referring to falling with greater momentum involving sports equipment referring to skating, skiing, rollerblading, skateboarding or bicycle riding, etc.; falling from one plane to another (FPA), referring to bed, chair, sofa, stairs or steps, etc.; falling on the same plane (OSAP), referring to slip, trip, etc., with small momentum; improper use of force (IUF), referring to repetitive motion or over-exertion, etc.; mechanical force (MEF), referring to exposure to tools and instruments involving knives, glass, door gap, falling object, or lifting device, etc.; cyclist injury (CY), referring to bicycle collision accident except colliding with a car; motorcycle passenger injury (MP), referring to passengers or pedestrians in motorcycle accidents; vehicle passenger injury (VP), referring to passengers or pedestrians in vehicle accidents; physical contact with people (PCP); other unexpected reasons (OUR).