“…The age range of patients (19 years to 76 years) in this study is similar to that reported in a previous Nigerian study [2] and an Australian study [12]. The mean (standard deviation) age of the patients 50.08±13.54 years noted in this study is close to the 51.5years reported in Australia [12] but lower than the 61.4±12.2 years and 60.6±12.7 years recorded in previous studies [10,13] and higher than the 48.4±16.6 years recorded in a previous Nigerian study [2]. The most prevalent age group was 41-50years in this study, a finding different from the most prevalent age group of 60-69years reported in previous studies [12,14].…”