Comparison 1. Manipulation versus placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 PAIN: cervical manipulation vs placebo	1		Std. Mean Difference (IV, Random, 95% CI)	Totals not selected
1.1 Single session: immediate‐ or short‐term follow‐up	1		Std. Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
2 PAIN: thoracic manipulation vs placebo	1		Std. Mean Difference (IV, Random, 95% CI)	Totals not selected
2.1 Single session: immediate‐term follow‐up	1		Std. Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]