Table 4 Mean effect sizes (Cohen’s d) for the three headache parameters recorded by parents and children for the 2 treatment conditions

Parents

 Duration

0.63 medium

0.11 insignificant

0.70 medium

0.39 small

 Frequency

0.59 medium

1.42 large

1.20 large

0.67 large

 Intensity

0.40 small

0.14 insignificant

0.56 large

0.54 large

 N

19

16

17

12

Children

 Duration

0.52 medium

0.05 insignificant

0.04 insignificant

0.16 insignificant

 Frequency

0.88 large

0.49 small

1.12 large

0.51 large

 Intensity

0.16 insignificant

1.25 large

0.38 small

0.97 large

 N

19

15

16

12