Validation of Placebo in a Manual Therapy Randomized Controlled Trial

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Published online 2015 Jul 6. doi: 10.1038/srep11774

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Table 2

Baseline demographics and characteristics.

	CSMT	Placebo
Number	35	35
Age (range)	41.2 ± 11.3 (19-63)	39.6 ± 9.7 (18-65)
M/F	6/29	6/29
Migraine without aura	33	31
Migraine with aura	9	10
Duration (years with migraine)	22.6 ± 13.6	20.8 ± 10.7
Frequency (30 days/month)	7.6 ± 4.3	7.8 ± 5.0
Co-morbid tension-type headache (%)	25 (71.4%)	27 (77.1%)
Previously received CSMT (%)	12 (34.3%)	13 (37.1%)

*CSMT = chiropractic spinal manipulative therapy; ± = standard deviation.