Among 143 women whose menarcheal age was documented during a longitudinal growth study, recall 39 years after the event gave the following results: menarche was recalled as 0.2 years earlier than the actual date (p<0.05), the standard deviation of recalled age was 0.3 years larger (p < 0.01), and the coefficient of correlation, r, between actual and recalled age was 0.60 ± s.e. 0.05.
Damon, Albert and Bajema, Carl Jay
"Age At Menarche: Accuracy of Recall After Thirty-Nine Years,"
3, Article 4.
Available at: https://digitalcommons.wayne.edu/humbiol/vol46/iss3/4