From: Testing a model of association between patient identified problems and responses to global measures of health in low back pain patients: a prospective study
Task difficulty (VAS)
Baseline
12 Months
General health
n
Median
IQR
Excellent
32
62
26
19
0
2
Very good
137
63
31
110
18
Good
171
28
112
9
29
Fair
47
68
46
35
54
Poor
10
75
23
13
61