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Table 4 Studies on mean age at menarche in different regions

From: Growth status and menarcheal age among adolescent school girls in Wannune, Benue State, Nigeria

Year n Age Sample Age at menarche 1 Reference
1949 250 8-18 Urban school girls (Lagos) 14.3 [33]
1960-1 335 12-19 Urban school girls (Ibo) 14.07 ± 0.16 [34]
1973-4 2029 10-17 urban school girls (Ibadan) 13.7 ± 0.03 [24]
  328   Rural 14.5 ± 0.09  
1978 1365 10-18 All 13. 54 ± 0.07 [25]
  1216   Urban 13.48 ± 0.09  
  149   Semi-urban 14.05 ± 0.18  
1982-3 2207 10-19 Urban (Enugu) 13.3 ± 1.09 [26]
1985    Mixed (Ilorin) 13.7 ± 1.0 [27]
1990    School girls (Ile-Ife) 13.4 ± 1.4 [28]
  5736 11-18 School girls 13.42 ± 1.51 [29]
  352 13-15 Urban school girls 13.94 ± 1.31 [30]
  859   Urban school girls (Portharcourt) 13.19 ± 1.32 [32]
    Rural school girls (Etche) 14.22 ± 1.47  
2006 358 12-18 School girls (Kaduna) 12.81 ± 1.31 [35]
  900 10-20 Urban school girls (Portharcourt) 13.43 ± 2.19 [31]
2009 722 12-18 Rural school girls (Tarka) 13.02 ± 3.0 [Present study]
  1. 1Years, median/mean ± SD.