Table 1. Study characteristics.

Author	Year	Country	Sample size	Mean age	Male	Female
Alrajban et al. [2]	2024	Saudi Arabia	379	NA	184	195
Khan et al. [10]	2011	Pakistan	150	NA	78	70
Nwasor [15]	2010	Nigeria	88	28	71	17
Gqiba et al. [25]	2017	South Africa	112	23	38	74
AlKhilaiwi et al. [26]	2018	Saudi Arabia	236	NA	153	82
Adeleye and Eze [27]	2010	Nigeria	296	25.85	216	80
Bruhn et al. [28]	1973	America	688	NA	0	0
Fitzgerald et al. [29]	2021	Austria	186	23	8	12