|   Authors Years  |       Region  |       Case/total number (%)  |       Source  |       Male: female  |       Mean of age (year)  |       Typesof headache*  |       Masturbatory HSA (%)  |    
|   Hanashiro et al., 2015  |       Japan  |       7/2546 (0.28%)  |       Health checkup  |       NR  |       NR  |       NR  |       NR  |    
|   Pfortmueller et al., 2013  |       Swiss  |       27/445 (6.06%)  |       Emergency service  |       23:4  |       Men 34 Women 43  |       NR  |       NR  |    
|   Pascual et al., 2008  |       Spain  |       18/6412 (0.28%)  |       Clinic  |       14:4  |       40  |       NR  |       NR  |    
|   Tuğba et al., 2008  |       Turkey  |       4/245 (1.63%)  |       Clinic  |       NR  |       NR  |       NR  |       NR  |    
|   Lamer, 2006  |       United Kingdom  |       25/ 6,019 (0.42%)  |       Clinic  |       19:6  |       41.6  |       NR  |       NR  |    
|   Kraft, 1979  |       Denmark  |       6/460 (1.3%)  |       Clinic  |       NR  |       NR  |       NR  |       NR  |    
|   Nick & Bakouche, 1960  |       France  |       16/5800 (0.28%)  |       Clinic  |       NR  |       NR  |       3/11/0/2  |       NR  |