Average age

Extreme

Niang et al. [7]

65 years

(43 - 96 years)

Mohammed et al. [8]

68 years

(47 - 96 years)

Ndiaye et al. [9]

68.6 years

(43 - 93 years)

Amegbor et al. [10]

70 years

(45 - 95 years)

Our study

68.59 years

(40 - 92 years)