Placebo by proxy expectations toward acupuncture change over time: a survey comparing parental expectations to acupuncture pre- and postoperatively

Table 4 Linear regression analyses

Parental expectancy change	Postoperative vomiting	B (CI 95%)	P-value
Logical	Unadjusted	−1.275 (− 1.705 to − 0.846)	< 0.001
Logical	Adjusted^a	− 1.271 (− 1.703 to − 0.839)	< 0.001
Alleviate	Unadjusted	−1.674 (−2.247 to − 1.100)	< 0.001
Alleviate	Adjusted^a	− 1.721 (− 2.300 to − 1.143)	< 0.001
Recommending	Unadjusted	−0.897 (−1.365 to − 0.429)	< 0.001
Recommending	Adjusted^a	− 0.927 (− 1.397 to − 0.456)	< 0.001
Successful	Unadjusted	−0.736 (−1.119 to − 0.353)	< 0.001
Successful	Adjusted^a	− 0.777 (− 1.153 to − 0.401)	< 0.001

Unadjusted and adjusted associations between postoperative vomiting and changes of parental expectancy
^aAdjusted for children’s and parents’ age, children’s gender, parents’ education, parental anxiety

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