From: Description of recurrent headaches in 7–14-year-old children: Baseline data from a randomized clinical trial on effectiveness of chiropractic spinal manipulation in children with recurrent headaches
Variable
Factor1
Factor2
Frequency
0.0006
0.2953
Intensity
0.4347
− 0.0814
Duration
0.3482
− 0.0159
Medication
0.3039
− 0.0062
Length
0.2942
0.2379