Accuracy of age estimation in 14-year-old females by two skeletal age standards

OBJECTIVE: To study the accurate of Li Guozhen's Percent Numeration and the Development Standard of Chinese Wrist Bone CHN Numeration of age estimation in 14-year-old females. METHODS: Fifty-one 14-year-old females from three middle schools in Loudi City in Hunan were selected randomly, whose left wrists were photographed with X-rays under the same condition. Skeletal age was estimated following the two numerations. The two skeletal ages were compared with each other and with chronological age. RESULTS: The skeletal age from Percent Numeration and CHN Numeration have no significance difference, P > 0.05. And the skeletal ages of the two Numerations have no significance difference either, P > 0.05. CONCLUSION: The Percent Numeration and the CHN Numeration are still suited for age estimation in 14-year-old females.