Table 4 Effects of experimental treatment (vs. controls) on the main headache characteristics after inclusion of drop-outs (intention-to-treat analysis)
Imputation of missing value: | |||
|---|---|---|---|
Mild improvement | Moderate improvement | Marked improvement | |
Frequency | χ2=8.73 p=0.033 | χ2=5.56 p=0.135 | χ2=5.56 p=0.135 |
Intensity | χ2=17.94 p=0.001 | χ2=14.68 p=0.005 | χ2=14.68 p=0.005 |
Duration | χ2=14.98 p=0.002 | χ2=14.07 p=0.003 | χ2=14.07 p=0.003 |