Table 2.
Number of imaging tests by year
| Year | Mean number of imaging tests | SD |
|---|---|---|
| <2002 | 1.29 | 0.76 |
| 2002 | 1.63 | 1.05 |
| 2003 | 1.96 | 1.04 |
| 2004 | 1.88 | 1.00 |
| 2005 | 2.20 | 1.12 |
| 2006 | 2.53 | 1.14 |
| 2007 | 2.44 | 1.20 |
| 2008 | 2.50 | 1.21 |
| Total | 2.12 | 1.14 |
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