Table 4.
Age-sex adjusted odds ratios (AOR) and 95% confidence intervals for comparison of activity limitations and chronic opioid use between persons at differing chronic pain grades.
| Grade 0: Chronic Pain Absent (Relative to Grade 1) | Grade 1: Mild Chronic Pain (Reference category) | Grade 2: Bothersome Chronic Pain (Relative to Grade 1) | Grade 3: High Impact Chronic Pain (Relative to Grade 1) | Grade 3 Relative to Grade 2 | c-statistic | ||
|---|---|---|---|---|---|---|---|
| Activity limitations | |||||||
| Pain interference with life activities (% Moderate or severe) | AOR = 0.52 (0.31 – 0.87) | AOR=1.0 | AOR=7.1 (3.9 – 12.6) | AOR=82.0 (37.9 – 177.1) | AOR=11.6 (5.4 – 24.7) | c=0.89 | |
| Health limits doing household chores (% limited a lot) | AOR = 1.26 (0.49 – 3.2) | AOR=1.0 | AOR=4.7 (1.7 – 12.8) | AOR=18.2 (7.7 – 43.1) | AOR=3.9 (2.0 – 7.7) | c=0.82 | |
| Health limits using transportation (% limited a lot) | AOR = 1.5 (0.46 – 4.8) | AOR=1.0 | AOR=2.7 (0.69 –10.7) | AOR=5.3 (1.7 – 16.6) | AOR=1.9 (0.7 – 5.1) | c=0.76 | |
| Health limits leisure activities (% limited a lot) | AOR = 0.68 (0.31 – 1.5) | AOR=1.0 | AOR=0.96 (0.35 – 2.6) | AOR=7.6 (3.6 – 15.8) | AOR=7.9 (3.5 – 17.8) | c=0.78 | |
| Health limits getting out with friends or family (% limited a lot) | AOR = 1.0 (0.39 – 2.7) | AOR=1.0 | AOR=1.7 (0.54 – 5.5) | AOR=8.4 (3.4 – 21.0) | AOR=4.8 (2.1 – 11.5) | c=0.78 | |
| Long-term opioid therapy | |||||||
| Percent received 60+ days supply of opioids in 3 months | AOR = 0.11 (0.02 – 0.60) | AOR=1.0 | AOR=1.05 (0.3 – 3.6) | AOR=8.3 (3.2 – 21.7) | AOR=8.0 (3.0 – 21.4) | c=0.81 |
NOTES: Adjusted odds ratios and their 95% confidence intervals shown in boldface have confidence intervals that do not include the estimate for the reference chronic pain grade, indicating that differences exceed chance expectation.
The c statistic is interpreted as the probability that a randomly selected subject with the indicator (activity limitations) will have a higher predicted probability of the indicator than a randomly selected subject without the indicator.