| Year | Sample size | Population studied | Primary headache (%) | Migraine (%) | TTH (%) | CDH (%) |
Osuntokun [9] | 1982 | 903 | GP* | nsβ | 4.6 | nsβ | nsβ |
Osuntokun [11] | 1992 | 18,954 | GP* | 51 | 5 | nsβ | nsβ |
Longe [10] | 1988 | 2925 | GP* | nsβ | 6.3 | nsβ | nsβ |
Orji [12] | 1997 | 4398 | Children | nsβ | 6.4 | nsβ | nsβ |
Kolawale [3] | 2009 | 1513 | USt** | nsβ | 29.9 | nsβ | nsβ |
Ojini [7] Ofovwe [14] | 2009 2010 | 523 1679 | MS*** SS## | 46 19.5 | 6.4 13.5 | 18.1 nsβ | nsβ nsβ |
Oshinaike [8] | 2013 | 402 | HW# | 39.3 | 7.4 | 28.6 | nsβ |
Onwuekwe [6] | 2014 | 133 | HW# | 64.7 | ns | nsβ | nsβ |
Ezeala-Adikaibe [1] | 2012 | 180 | MS*** | 88.3 | 18.1 | 36.8 | 17 |
Ezeala-Adikaibe [13] | 2014 | 940 | GP* | 66.7 | 6.4 | 13.8 | nsβ |
Ezeala-Adikaibeδ | 2016 | 499 | MNS*** | 89.9 | 8.9 | 22.9 | 8.5 |