Fig. 1From: Do psychological factors or radiographic severity play a role in the age of onset in symptomatic developmental dysplasia of hip and femoroacetabular impingement syndrome?Plot of Age of FAI syndrome Onset (years) against the selected variables, with a fitted linear regression line and 95% confidence limits. Tonnis Grade (grade 1 vs. grade 0) and History of Hip Surgery (Yes vs. No), with the fitted regression line at the mean level of each group. Observed sample, N = 84 for the FAI syndrome groupBack to article page