Table 4.

Distribution of 78 dogs in a blinded clinical trial of canine hip dysplasia (CHD) with gold bead implantation or placebo treatment according to the main outcome variable, change in pain signs of CHD, versus the owner's guess of treatment given. The opinion of the owner was requested at the end of the blinded trial period (six months), but before the randomization code was broken.

	Pain signs of canine hip dysplasia
Owner's guess of treatment given	Complete recovery	Large improvement	Mild improvement	No change in signs	Mild aggravation	Large aggravation	Total number of dogs
Placebo	0	0	1	6	2	2	11
Gold	11	28	10	3	0	0	52
Don't know	0	0	2	10	1	2	15