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Table 1

Return to:   Clustering Patients on the Basis of Their Individual Course of Low Back Pain Over a Six Month Period

Baseline variables and major outcomes of patients in the study and across clusters

Patients
in the study
n = 165
Patients
excluded
n = 68
Cluster 1,
n = 43
Cluster 2,
n = 23
Cluster 3,
n = 72
Cluster 4,
n = 27
Age, mean,
(range) *
45
(21-69)
42
(16-64)
42
(21-62)
46
(33-63)
45
(24-69)
49
(27-67)
Gender, % male545056464970
Pain, VAS mean,
(SD)*
4.4
(2.1)
4.4
(2.4)
3.7
(2.6)
5.3
(1.9)
4.6
(1.9)
4.2
(2.1)
Leg pain, %484835475357
> 30 days of pain previous year, % *586156306470
EQ5D baseline, mean
(range)
0.73
(-0.05-1.00)
0.78
(0.70-0.84)
0.79
(-0.05-1.00)
0.69
(0.26-0.84)
0.72
(-0.05-1.00)
0.70
(-0.05-0.84)
Improvement by 4th visit, %735880736874
Total number of days with bothersome pain, mean
(SD) *
38
(35)
35
(32)
33
(37)
28
(20)
35
(31)
64
(39)
* Denotes statistically significant differences between clusters.