The femoral collodiaphyseal angle amongst selected Kenyan ethnic groups

W O, A N, A K. "The femoral collodiaphyseal angle amongst selected Kenyan ethnic groups." Journal of Morphological Science. 2011;28(2):129-131.


The femoral collodiaphyseal angle amongst selected Kenyan ethnic groups
Otsianyi, WK.*, Naipanoi, AP. and Koech, A.
University of Nairobi (Human Anatomy), Nairobi, Quénia *E-mail:
Background: There is evidence suggesting that there is inter-populational differences of the femoral neck- shaft angle which has been attributed to disparity in the economic and physical activity levels. As knowledge of the collodiaphyseal angle (CDA) is important to orthopaedic surgeons, there is need to elucidate whether there is significant variation of this angle among the diverse ethnic groups in Kenya. Objectives: Describe the variability of the CDA among the different ethnic groups (whose economic and physical activity differ) in the Kenyan population. Setting: The study was conducted at the radiology department of Kenyatta National Hospital. Materials and methods: Normal pelvic radiographs of patients seen at Kenyatta National Hospital were grouped into five major ethnic groups and were used in this study. Three readings of the CDA were then measured using goniometry and the average recorded. Results: Four hundred and thirty-two femora were studied, 133 were female while 299 were male, and the age ranged from 16-95 years. The average CDA angle was found to be 127.56° + 3.75 (the range being 104-145°, the mode 130°). The CDA was 126.11° + 3.22 and 128.21 + 3.79 in females and males respectively. This angle was largest among the nomadic group (129.72 + 4.76) and smallest (127.25 + 4.15) among the highland Bantu (ANOVA revealed an F of 2.022, level of significance of 0.09). Conclusions: The average CDA described here is lower compared to what has been presented in other populations. Interethnic differences were observed and these differences could be explained by the varying activities of the different groups in their day to day life.

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