From: Predicting long-term response to strong opioids in patients with low back pain: findings from a randomized, controlled trial of transdermal fentanyl and morphine
Response at 1 month
Response at 6 months n (%)
Odds ratio (95% CI)
No
Yes
Missing
30% Response
188 (55)
49 (14)
105
4.36 (2.61–7.28)
44 (35)
50 (40)
30
50% Response
261 (62)
36 (9)
5.08 (2.36–10.93)
14 (29)
20 (42)
14