I used the following formula to ask MS Excel to compare two age fields to see
if they are within one year (plus or minus) of matching each other. (It
returned all "NO" answers, which was incorrect).

=IF(((B2=C2)*OR(B2=C2+1)*OR(B2=C2-1)*OR(B2+1=C2)*OR(B2-1=C2)),"YES","NO")

'Suggestions, please?