Table 3 Change in administration of any prophylaxis by hospital and service across the three study time periods

Hospital A

Medicine

8,021 (52.4%)

15,405 (67.0%)

8,655 (72.8%)

<0.01

Ortho/Trauma

1,275 (62.0%)

3,035 (87.9%)

1,808 (97.2%)

<0.01

Other Surgery

9,344 (53.7%)

20,273 (80.2%)

9,726 (83.7%)

<0.01

All

18,640 (53.6%)

38,713 (74.8%)

20,189 (79.6%)

<0.01

Hospital B

Medicine

4,937 (50.8%)

9,306 (64.0%)

4,510 (65.5%)

<0.01

Ortho/Trauma

826 (41.3%)

2,810 (91.0%)

1,548 (96.4%)

<0.01

Other Surgery

981 (51.7%)

1,989 (71.9%)

1,088 (82.7%)

<0.01

All

6,744 (49.6%)

14,105 (69.1%)

7,146 (72.9%)

<0.01

Hospital C

Medicine

5,553 (74.3%)

8,123 (77.9%)

4,445 (79.4%)

<0.01

Ortho/Trauma

2,947 (81.8%)

4,682 (94.3%)

2,294 (97.3%)

<0.01

Other Surgery

5,932 (54.8%)

10,878 (73.1%)

5,257 (72.7%)

<0.01

All

14,432 (65.9%)

23,683 (78.3%)

11,996 (79.0%)

<0.01

Overall

Medicine

18,511 (57.0%)

32,834 (68.4%)

17,610 (72.3%)

<0.01

Ortho/Trauma

5,048 (65.9%)

10,527 (91.5%)

5,650 (97.0%)

<0.01

Other Surgery

16,257 (53.9%)

33,140 (77.2%)

16,071 (79.7%)

<0.01

All

39,816 (56.7%)

76,501 (74.7%)

39,331 (78.1%)

<0.01