Table 2.
Incident chronic back pain over 5-Year follow-up (n=227)*
| n (%) with back pain outcome | Back pain intensity by locationa | Oswestry scoreb | |
|---|---|---|---|
| Primary outcome | |||
| Any chronic back painc (miss.=7) | 110 (50.0%) | 4.8 (2.0)d | 23.5 (1.6) |
| Secondary outcomes | |||
| Chronic low back pain (miss. =2) | 102 (45.3%) | 4.6 (1.9)e | 23.7 (14.5) |
| Chronic mid/upper back pain (miss.=8) | 33 (14.5%) | 5.2 (2.1)f | 25.3 (14.0) |
miss.= missing
chronic back pain defined as back pain of duration ≥ 3 months
back pain intensity (mean [SD]) on a 0 to 10 numerical pain scale with 0 being no pain and 10 being the worst pain possible.
Oswestry Disability Index (mean [SD]) on a 0 to 100 scale with 0 being no back-related functional limitations and 10 being the most severe functional limitations. Participants reported ODI items taking into account both pain in the low back, midback, and upper back regions.
In either the low back [lumbar] or mid/upper back [thoracic] regions
Scores reflect the worst pain intensity reported, between the low back and/or mid/upper back locations
Pain intensity scores for low back pain
Pain intensity scores for mid/upper back pain