Khurshid Nadir, Nabeel Qamar, Mohammad Abdul Azeem, Bair Ahmed Tirmizi S Zubair, Rais Ahmed, Nauman, Sameen Nadir.
Cutoff Age and Gender Difference for Various Schmeling`s Staging System of Clavicular Ossification..
J Rawal Med Coll Jan ;19(1):37-40.

Background: To determine the cut-off ages and its gender differences for various Schmeling`s staging system of clavicular ossification in population of Karachi. Methods: In this cross sectional study non probability, purposive sampling technique was used for sample collection. Total 500 digital radiographs of chest posterior-anterior (PA) view were included in the study. Each x-ray was reviewed and assessed for the ossification stage of the medial end of clavicle. Results: Radiographs of 500 participants(16 to 32 years of age) were studied. Out of which 265 were males and 235 were females. Range of age of a person having the clavicular ossification stage from 1 to 5 were represented. Cut off ages for stage 1-5 as 18, 19, 22, 25 and 28 were determined, respectively. There was a gender difference in ossification stage of medial end of clavicle. In M/F the age for stage-1 was 18/17 years while age for stage 5 was 27/29 years respectively. Conclusion: The use of conventional radiography remains one of the important tools for the age estimation in forensic medicine. In addition, Schmeling`s ossification staging of medial end of clavicle should be cautiously observed with respect to socio-economic and geographical aspect of the population studied.

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