Q: If there is a column for P values in a table and if a P value “straddles” rows (eg, provides the P value for men vs women), how should this be shown?
A: There are several options, with option 1 being preferred:
1. Center the P value between the items it compares (eg, between the values for men and women) and consider the use of a side brace.
2. If only 2 items are being compared, list the P value on the line giving the overall category (eg, Sex).
3. Use footnotes to indicate the P value for items being compared (eg, use a superscript “a” next to the value for men and the value for women and indicate the P value for this comparison in a footnote labeled “a”).
Q: If some of the confidence intervals given in a table column include negative values, how do you combine the minus sign and the hyphen that would normally be used in such a range in a table?
A: With ranges that include a minus sign, use to to express the range, rather than a hyphen. Carry this style throughout the entire table, even for those values that do not include a minus sign.—Cheryl Iverson, MA