Hip impingement in the Indian population: hip anthropometry measurements in 100 hips.

We studied 100 hip joints in Indian patients to measure femoral head sphericity, head-neck offset and alpha angle. Our study indicates that the mean values of the above measurements are far below the "danger" level for the onset of femoro-acetabular impingement. It remains to be seen whether these findings explain the low incidence of primary hip osteoarthritis in the Indian population.