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Table 3: 
Averages of total fluoroscopic time, number of DSA frames, DAP, and maximum ESD in each institution
VariableInstitutionOverall (n = 103)
1 (n = 48)2 (n = 20)3 (n = 15)4 (n = 10)5 (n = 5)6 (n = 5)
Total fluoroscopic time, min62.3 ± 35.150.6 ± 30.0114.8 ± 40.232.8 ± 24.056.4 ± 14.7107.8 ± 53.867.1 ± 41.6
Total no. of DSA frames654 ± 376960 ± 3561447 ± 368604 ± 2311756 ± 2024770 ± 191883 ± 626
DAP, Gy × cm2218 ± 141327 ± 162326 ± 98215 ± 162**257 ± 150
Maximum ESD, Gy2.1 ± 1.11.6 ± 0.82.4 ± 1.31.5 ± 1.21.3 ± 0.71.0 ± 0.21.9 ± 1.1
  • Note:—Data are given as average ± SD. DSA indicates digital subtraction angiography; DAP, dose area product; ESD, entrance skin dose.
  • * DAP meters were not available.