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All
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MRI
|
No MRI
|
|---|
| |
[n = 433]
|
[n = 252]
|
[n = 181]
|
|---|
|
MRI Volume
a
(% Medicare Visits)
| | | |
|
Pre-MRI year
|
1.151
|
1.460
|
0.595
|
|
Post-MRI year
|
1.312
|
1.530
|
0.919
|
|
∆(Post-Pre)
|
0.161
|
0.071
|
0.324
|
|
Ortho-MRI Volume
b
(% Medicare Visits)
| | | |
|
Pre-MRI year
|
1.066
|
1.391
|
0.482
|
|
Post-MRI year
|
1.239
|
1.478
|
0.809
|
|
∆(Post-Pre)
|
0.173
|
0.087
|
0.327
|
|
MRI Year (%)
| | | |
|
2006
|
38.55
|
44.72
|
27.43
|
|
2007
|
26.54
|
31.21
|
18.14
|
|
2008
|
34.91
|
24.08
|
54.42
|
|
Number of providers (%)
| | | |
|
1-2
|
2.37
|
1.47
|
3.98
|
|
3-5
|
6.64
|
5.90
|
7.96
|
|
6-10
|
26.86
|
12.53
|
52.65
|
|
>10
|
64.14
|
80.10
|
35.40
|
|
Practice Payer Mix (%)
| | | |
|
Medicare
|
27.07
|
26.13
|
28.77
|
|
Private Insurance
|
46.90
|
47.83
|
45.22
|
|
Workers’ Comp
|
12.30
|
12.10
|
12.64
|
|
Other
|
13.74
|
13.94
|
13.38
|
|
Area Characteristics (Post-Pre)
| | | |
|
∆Per capita income ($1000s)
|
1.211
|
1.916
|
−0.058
|
|
∆Pop age 65+ (%)
|
0.449
|
0.467
|
0.417
|
|
∆Unemployment (%)
|
2.860
|
2.461
|
3.578
|
|
∆MDs/1000 Population
|
−0.0018
|
−0.0045
|
0.0032
|
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Sources: Medicare Claims Data; AAOS Survey Data, 2012; Area Resource File (see text)
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aHCPCS codes 71552, 73218, 73718, 74183, 77059, 70543, 70551, 70553, 72141, 72146, 72148, 72156, 72157, 72158, 72195, 72197, 73220, 73221, 73222, 73223, 73720, 73721, 73722, 73723, 70336, 70540, 70542, 70552, 71550, 71551, 72142, 72147, 72149, 72196, 73219, 73719, 74181, 74182, or 77084
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bHCPCS codes 72141, 72146, 72148, 72156, 72157, 72158, 72195, 72197, 73220, 73221, 73222, 73223, 73720, 73721, 73722, or 73723
