|
Frequency of within-institution duplicate imaging 12 months before and 12 months after introduction of PACS |
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| Frequency of duplicate imaging |
|||
| Before PACS |
After PACS |
P |
|
|
|
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| Duplicate test within less than 7 days |
|||
| X-ray |
|||
| Chest |
1146/60598 (1.9) |
1070/60366 (1.8) |
0.12 |
| Abdomen |
339/8512(4.0) |
273/8355 (3.3) |
0.01 |
| Total |
1485/69110 (2.2) |
1343/68721 (2.0) |
0.01 |
| Computed tomography |
|||
| Abdomen/Pelvis |
275/14213 (1.9) |
351/16060 (2.2) |
0.13 |
| Head |
1099/16523 (6.7) |
1180/18102 (6.5) |
0.62 |
| Chest |
78/6627 (1.2) |
120/8173 (1.5) |
0.13 |
| Total |
1452/37363 (3.9) |
1651/42335 (3.9) |
0.92 |
| Duplicate test within less than 30 days |
|||
| X-ray |
|||
| Chest |
3948/58212 (6.8) |
3592/58204 (6.2) |
<0.001 |
| Abdomen |
667/8248 (8.1) |
595/8123 (7.3) |
0.07 |
| Total |
4615/66460 (6.9) |
4187/66327 (6.3) |
<0.001 |
| Computed tomography |
|||
| Abdomen/Pelvis |
596/13969 (4.3) |
786/15764 (5.0) |
0.003 |
| Head |
1640/16364 (10.0) |
1856/17868 (10.4) |
0.26 |
| Chest |
200/6525 (3.1) |
309/8019 (3.9) |
0.01 |
| Total |
2436/36858 (6.6) |
2951/41651 (7.1) |
0.01 |
| Duplicate test within less than 60 days |
|||
| X-ray |
|||
| Chest |
6032/56841 (10.6) |
5519/56902 (9.7) |
<0.001 |
| Abdomen |
857/8143 (10.5) |
789/8012 (9.9) |
0.16 |
| Total |
6889/64984 (10.6) |
6308/64914 (9.7) |
<0.001 |
| Computed tomography |
|||
| Abdomen/Pelvis |
968/13679 (7.1) |
1174/15461 (7.6) |
0.09 |
| Head |
1883/16257 (11.6) |
2157/17736 (12.2) |
0.10 |
| Chest |
341/6405 (5.3) |
498/7857 (6.3) |
0.01 |
| Total |
3192/36341 (8.8) |
3829/41054 (9.3) |
0.01 |
|
Abbreviations: PACS, picture archiving communication systems. All numbers reported as no. of index tests associated with a duplicate test/total no. of index tests (%). All P values are for difference in frequency of duplicate imaging before versus after PACS. | |||
You et al. BMC Health Services Research 2008 8:234 doi:10.1186/1472-6963-8-234 |
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