Table 3: Placebo effect according to type of drug administration: intravenous (i.v.) or subcutaneous (SC).

Route

Prevalence

95% CI

Q-HET

Df-het

p-value-het

I2

i.v.

0.319

0.154; 0.485

10.633

1

0.001

90.59

SC

0.233

0.173; 0.293

81.754

10

0

87.77