Table 1.

MS prevalence for Saudi Arabia

Regions	Total hospital (MS)	Hospitals Included in Registry	MS patients from 20 hospital	Prevalence/100000 population	Projected prevalence/100000 population
Western Region	30	7	990	9.3	39.9
Central Region	36	7	866	9.0	46.3
Eastern Region	22	4	378	7.7	42.4
Southern Region	9	2	173	3.6	16.2
Northern Regiona	8	0	109	4.4	35.2
Total “2017”	105	20	2516	7.7	40.4

^aPatients referred to other regions. For calculating projected prevalence for northern region we assumed 109 patients were referred from a single hospital of northern region to hospitals in other regions