| PMC full text: | Pain. Author manuscript; available in PMC 2009 Aug 31. Published in final edited form as: |
Table 3
Worry about pain and physical disability for back pain (n = 971), headache (n = 1078), or orofacial pain (n = 455) patients at 6-month follow-up (mean and standard deviation) by baseline Pain Days (Table 3a) and Risk Score (Table 3b)*
| Table 3a Chronic pain classification based on Pain Days in the six months before baseline | ||||
|---|---|---|---|---|
| Pain and disability status at 6 months | Not chronic: 1–89 Pain Days | Chronic: 90–149 Pain Days | Chronic: ≥150 Pain Days | Correlation with Pain Days |
| Worry about pain (0–10 rating) | ||||
| Back pain | 3.8 (3.1) | 5.0 (3.0) | 5.7 (3.2) | 0.29 |
| Headache | 4.1 (3.1) | 4.9 (3.0) | 5.8 (3.4) | 0.22 |
| Orofacial pain | 3.3 (2.7) | 3.6 (2.8) | 4.9 (3.2) | 0.25 |
| SF-36†Physical Function at 6 months, mean (SD)‡ | ||||
| Back pain | 80.3 (20.6) | 68.2 (23.7) | 56.9 (26.9) | −0.42 |
| Headache | 82.6 (21.8) | 77.1 (23.6) | 70.4 (26.0) | −0.21 |
| Orofacial pain | 83.5 (23.4) | 81.6 (22.9) | 76.0 (26.5) | −0.15 |
| Table 3b Chronic pain classification based on prospective Risk Score at baseline | ||||
|---|---|---|---|---|
| Pain and disability status at 6 months | Lower risk (0–15) | Possible chronic pain (16–21) | Probable chronic pain (22–28) | Correlation with Risk Score |
| Worry about pain (0–10 rating) | ||||
| Back pain | 3.6 (2.9) | 5.5 (3.2) | 7.1 (2.8) | 0.46 |
| Headache | 3.6 (2.9) | 5.4 (3.1) | 6.6 (3.1) | 0.40 |
| Orofacial pain | 3.7 (2.9) | 4.4 (3.0) | 6.0 (3.5) | 0.33 |
| SF-36 Physical Function at 6 months, mean (SD) | ||||
| Back pain | 80.2 (18.7) | 62.3 (25.9) | 44.0 (25.6) | −0.53 |
| Headache | 85.3 (19.4) | 73.3 (25.5) | 64.1 (27.1) | −0.33 |
| Orofacial pain | 84.6 (21.2) | 70.8 (29.1) | 61.2 (27.2) | −0.36 |
*All correlations in Tables 3a and 3b are significant at p <.0001.
†Short Form-36. Correlations are negative because a lower SF-36 score indicates greater disability.
‡Standard deviation.