... in local recurrence at 3 years with a two-sided test at the 5% level of significance.[ 7 ] Cumulative ... months versus 2.7 months (stratified log-rank test, 2-sided P < .001).[ 57 ][ Level of evidence: 1iiDiii ] Palliative ...

... of medication errors when comparing pre- to postimplementation (two-sided test of proportions with an alpha level of 0. ...

... a power calculation using standard formula for a two-sided chi-square test. We based our effect size estimates on the ... a power calculation using standard formula for a two-sided chi-square test. We based our effect size estimates on the ...

... a power calculation using standard formulas for a two-sided equivalence test. Given the lack of data for the effects ...

... sample size calculations using standard formulae for a two-sided, chi-squared test at the 0.05 level of significance. For ...

... months versus 2.7 months (stratified log-rank test, 2-sided P < .001).[ 65 ][ Level of evidence: 1iiDiii ] Bevacizumab ...

... sample size calculations using standard formulae for a two-sided chi-squared test at the 0.05 level of significance. We ...

... 12.1 (Stata Corp., College Station, TX). All tests were two-sided (except those for heterogeneity) and statistical significance was ...

... quantified with I 2 . Statistical significance for all tests, other than those of heterogeneity, was defined as a two-sided P-value < 0.05. No adjustment for multiple ...

... The primary endpoint was survival, which was 9.2 months (95% CI, 7.9–11.4 months) for chemotherapy and 11.1 months (95% CI, 7.6–15.5 months) for combined modality therapy (one-sided P = .017 by stratified log-rank test). Grades 4 and 5 toxicity were greater in ...