Article Figures & Data
Tables
Margin Result No Recurrence % (No.) Mild Recurrence % (No.) Severe Recurrence % (No.) Positive margin 75.0 (18/24) 0 25.0 (6/24) Negative margin 84.8 (39/46) 15.2 (7/46) 0 Margins Yes Number No Number Total Number Negative 39 (37.46)* 7 (8.54) 46 Positive 18 (19.54) 6 (4.46) 24 Total 57 13 70 * Numbers in parentheses are calculated.
Note: The observed χ2 = 0.99. If there were an effect at the P = .25 level, then the expected χ2 = 1.32; and at the P = .05 level, the expected χ2 = 3.841. Because the observed does not exceed the expected, the type of margin does not affect the frequency of no recurrence (P > .25). Accept the null hypothesis that the frequencies are the same.
Margins Yes Number No Number Total Number Negative 7 (4.6)* 39 (41.4) 46 Positive 0 (2.4) 24 (21.6) 24 Total 7 63 70 * Numbers in parentheses are calculated.
Note: The observed χ2 = 4.06. If there were an effect at the P = .05 level, then the expected χ2 = 3.84. Because the observed exceeds the expected, we conclude that the margin type affects the frequency of mild recurrence (P = .05). Reject the null hypothesis that the frequencies are the same.
Margins Yes Number No Number Total Number Negative 0 (3.94)* 46 (41.4) 46 Positive 6 (2.06) 18 (21.94) 24 Total 6 64 70 * Numbers in parentheses are calculated.
Note: The observed χ2 = 12.38. If there were an effect at the P = .005 level, then the expected χ2 = 7.88. Because the observed exceeds the expected, we conclude the margin type affects the frequency of severe recurrence (P = .005). Reject the null hypothesis that the frequencies are the same