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] |