Table 2.

Association among various outcome measures, reported as phi coefficient

	1hr pain free	2hr pain free	2hr relief	2hr normal functioning	Sustained pain free	Sustained normal functioning	No rescue medication	≥33% improve	≥50% improve
2hr pain free	0.66
2hr relief	0.22	0.35
2 hr normal functioning	0.26	0.38	0.54
Sustained pain free	0.38	0.55	0.19	0.24
Sustained normal functioning	0.17	0.28	0.32	0.61	0.40
No rescue medication	0.30	0.36	0.40	0.33	0.23	0.27
≥33%improve	0.18	0.28	0.70	0.40	0.16	0.23	0.32
≥50%improve	0.26	0.38	0.71	0.52	0.21	0.33	0.34	0.74
“Would take again”	0.13	0.22	0.20	0.27	0.18	0.29	0.25	0.22	0.19

All values in this tables have p≤0.01