Comparison of two radiological methods in the determination of skeletal maturity in the Indian pediatric population

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Abstract

To determine a more precise and reliable method between Greulich–Pyle (GP) and MacKay’s (MK) method for the determination of skeletal age in an Indian pediatric population. We carried out a cross sectional study for the assessment of skeletal age on the basis of examination of hand and wrist radiographs of 106 patients (1–15 years of age) who presented with soft tissue injury to hand by the GP and the MK method. These radiographs were evaluated by a radiologist and an orthopedic surgeon independently. In girls, the mean age difference between chronological and skeletal age was 8 months by the GP method, whereas it was 17 months by MK method. For boys, the mean age difference was 10 months by the GP method and by MKs method, it was 20 months. By the GP method, 44% of the boys showed a more reliable estimate of age whereas it was 10% by the MK method. However, the same for girls was 25% by the GP method and 16% by the MK method. The inter-rater reliability for the raters was found to be κ=0.68 and this was statistically significant (P<0.001), 95% confidence interval (0.504–0.848). We concluded that the GP method appeared to be more reliable in the determination of skeletal age in the Indian pediatric population.

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