Age reporting distortion in sibling histories obtained from women and men.

*<p>Modified Whipple’s Index: an index of age attraction for digits 0 and 5. The index is the ratio of the sum of the populations aged 15, 20, 25, 30, 35, 40, 45 and 50 divided by the sum of the population aged 13 to 52 and the result is multiplied by 500. Suggested interpretation is as follows: <105 is “highly accurate”; 105–109.9 is “fairly accurate”; 110–124.9 is “approximate”; 125–174.9 is “rough” and ≥175 is “very rough”.