Materials and Methods - The Journal of Headache and Pain

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Additional file 3: Effect Size on the percentage of patients showing response (≥
Ibuprofen
TRAM 75mg
TRAM 37.5mg
Placebo
0.56
0.44
0.68
DKP 25mg
DKP 25mg +
TRAM 37.5mg
Placebo
0.60
0.48
0.72
DKP 12.5mg
DKP 12.5mg +
TRAM 75mg
Placebo
0.37
0.25
0.49
DKP 25mg +
TRAM 75mg
DKP 12.5mg +
TRAM 37.5mg
50% max TOTPAR) over 6 hours - Estimated ER, RR and NNT (95% CI).
6 hours
Estimated ER (95% CI)
control
estimate
CI lower limit
CI upper limit
Placebo
0.72
0.61
0.83
Placebo
0.27
0.16
0.38
Placebo
0.55
0.42
0.68
Placebo
0.10
0.02
0.18
Placebo
0.25
0.14
0.36
Placebo
0.45
0.32
0.58
Placebo
5.50
2.49
12.17
Placebo
1.00
0.34
2.93
Placebo
2.50
1.04
6.01
Placebo
4.50
2.00
10.12
Placebo
2.22
1.68
3.29
Placebo
NA
NA
Placebo
6.67
3.53
60.10
Placebo
2.86
2.01
4.91
6 hours
Estimated RR (95% CI)
control
estimate
CI lower limit
CI upper limit
Placebo
3.70
1.61
8.49
Placebo
6.00
2.73
13.19
Placebo
5.60
2.54
12.36
Placebo
7.20
3.31
15.65
Placebo
2.70
1.13
6.44
6 hours
Estimated NNT (95% CI)
control
estimate
CI lower limit
CI upper limit
Placebo
3.70
2.42
7.88
Placebo
2.00
1.55
2.80
Placebo
2.17
1.66
3.16
Placebo
1.61
1.32
2.06
Placebo
5.88
3.28
28.48
NA: Not Applicable; ER: event rate; RR: relative risk; NNT: number needed to treat; CI: confidence interval.
Maximum TOTPAR corresponds to the theoretical maximum possible time-weighted sum of the PAR scores,
measured on a 5-point VRS (0=‘none’ to 4=‘complete’). RR values greater than 1 show that the experimental drug
is better than placebo. Statistical significance is assumed if the 95% CI does not include 1; NNT indicates the
number of patients who need to receive the treatment for 1 to achieve the outcome, in comparison with placebo; a
missing NNT means that the effect using the active treatment is less or equal to the effect of using placebo.
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