Table 2

Comparison of random test groups undergoing magnetic resonance imaging (MRI) with patients not undergoing MRI

Parameter
Group
n
Mean value
Standard deviation
P value

Current age (years)
No MRI
17
43.94
14.37


MRI
16
35.50
9.59


Total
33


0.127
Follow-up (months)
No MRI
17
69.41
14.71


MRI
16
63.25
11.57


Total
33


0.260
Lesion size (cm2)
No MRI
17
6.43
1.43


MRI
16
5.91
2.21


Total
33


0.423
Number of prior surgeries
No MRI
17
1.59
1.68


MRI
16
1.44
1.00


Total
33


0.736
Lysholm score preoperatively
No MRI
17
49.65
17.58


MRI
16
49.38
18.62


Total
33


0.986
Lysholm score currently
No MRI
17
80.12
19.61


MRI
16
83.75
13.51


Total
33


0.763

Braun et al. Arthritis Research & Therapy 2008 10:R68   doi:10.1186/ar2439