Final answer:
The nursing diagnosis for the 13-year-old girl with scoliosis who has been ordered to wear a therapeutic brace for 20 hours each day is Risk for Disturbed Body Image.
Step-by-step explanation:
The nursing diagnosis for the 13-year-old girl with scoliosis who has been ordered to wear a therapeutic brace for 20 hours each day is Risk for Disturbed Body Image. Scoliosis, with its abnormal curvature and twisting of the vertebral column, can lead to physical deformities and may impact body image. Wearing a brace for extensive periods of time may further contribute to body image concerns for the adolescent.