Table 3: Summary statistics for clinically improvement difference in pain intensity and back-specific disability by treatment groups.

Outcome measureGroupChange at completion of 4-week APA Change of 1-month followup
≥30% ( )<30% ( )≥30% ( )

Pain intensity
 Worst painTrue910.01981000.0108
Sham3645
 Average painTrue820.62851000.0108
Sham6345
 Overall pain intensityTrue1000.03251000.0108
Sham5445
Back-specific disability
 RMDQTrue730.3698640.6563
Sham4545

: value obtained by Fisher’s exact test.