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Table 2 Patient-reported measures overall and by healthcare system site

From: Back pain in seniors: the Back pain Outcomes using Longitudinal Data (BOLD) cohort baseline data

Baseline symptoms and outcomes Combined N. CA Detroit Boston
  N = 5239* N = 3164 N = 967 N = 1108
RMDQ (0–24), mean (SD) 9.5 ± 6.4 9.7 ± 6.0 12.8 ± 5.9 6.4 ± 6.4
Back pain duration, N (%)     
< 1 month 1749 (33%) 1215 (38%) 230 (24%) 304 (27%)
1 - 3 months 1015 (19%) 715 (23%) 137 (14%) 163 (15%)
3 - 6 months 344 (7%) 243 (8%) 46 (5%) 55 (5%)
6 - 12 months 313 (6%) 165 (5%) 96 (10%) 52 (5%)
1 - 5 years 776 (15%) 399 (13%) 197 (20%) 180 (16%)
> 5 years 1037 (20%) 426 (13%) 261 (27%) 350 (32%)
Back pain intensity (0–10), mean (SD) 5.0 ± 2.8 4.9 ± 2.7 6.2 ± 2.8 4.5 ± 2.7
Leg pain intensity (0–10), mean (SD) 3.4 ± 3.3 3.5 ± 3.2 4.2 ± 3.6 2.6 ± 3.1
BPI Interference (0–10), mean (SD) 3.3 ± 2.5 3.4 ± 2.5 3.8 ± 2.6 2.5 ± 2.3
PHQ-4 (0–12), mean (SD) 1.6 ± 2.5 1.9 ± 2.5 1.8 ± 2.8 0.4 ± 1.6
EQ-5D index (-0.1-1), mean (SD) 0.76 ± 0.17 0.76 ± 0.17 0.69 ± 0.20 0.81 ± 0.16
EQ5D VAS (0–100), mean (SD) 74.3 ± 18.4 73.6 ± 18.9 74.0 ± 18.4 76.6 ± 16.9
Falls in past 3 weeks, N (%)     
Patients with one or more fall 385 (7%) 288 (9%) 81 (8%) 16 (1%)
How many of these falls caused one or more injury**? 179 (46%) 121 (42%) 51 (63%) 7 (44%)
Back Pain Recovery Expectations (0–10), mean (SD) 5.5 ± 3.7 5.7 ± 3.6 4.9 ± 3.7 5.1 ± 4.0
  1. • *Sample sizes vary slightly for items due to slight variation in response rates with overall missing items being less than 0.3%. Complete data were available for RMDQ, back pain intensity, and BPI interference.
  2. **The number and percent of patients in whom a fall caused at least one injury where injury was defined as limiting regular activities for at least a day or requiring a visit to a doctor.
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