Statistical Methods - Text Mining Techniques for Healthcare Provider Quality Determination - page 143

Figure 36. ROC curves for predicted results

Table 13. Actual versus predicted mortality values by hospital for patients with COPD

Hospital Actual Mortality Predicted Mortality Difference

1 3.94 23.62 19.68

2

7.94 33.33 25.39

3 2.13 44.68 42.55

4 4.78 29.57 24.79

5 4.65 29.07 24.42

6 3.21 27.98 24.77

7 3.85 50.00 46.15

8 No COPD Patients

9 4.11 43.84 39.73

10 0 0 0

Hospital #4 has almost 30% in 3614, (Aorto)coronary bypass of four or more coronary arteries, sug-
gesting that it treats patients with very severe blockage in the coronary vessels. The same hospital has
approximately 20% of its procedures in 3611, 3612, and 3613.
Table 15 shows that there is considerable difference in the procedures performed across the hospitals.
For example, #1 has over 50% in 3615, Single internal mammary-coronary artery bypass. The remaining
hospitals are more divided in their procedures. Hospital #4 has almost 30% in 3614, (Aorto)coronary
bypass of four or more coronary arteries, suggesting that it treats patients with very severe blockage in
the coronary vessels. The same hospital has approximately 20% of the procedures in 3611, 3612, and
3613.