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Table 9. Mortality by number of diagnosis codes
Table of class by DIED
class
DIED(Died during hospitalization)
Total
Frequency
Row Pct
Col Pct
0
1
1
826
94.62
0.01
47
5.38
0.05
873
2
648327
99.83
9.44
1105
0.17
1.07
649432
3
948760
99.82
13.82
1723
0.18
1.67
950483
4
863970
99.56
12.59
3777
0.44
3.67
867747
5
796429
99.40
11.60
4806
0.60
4.67
801235
6
736908
99.05
10.74
7054
0.95
6.86
743962
7
643236
98.79
9.37
7846
1.21
7.62
651082
8
568825
98.42
8.29
9136
1.58
8.88
577961
9
528067
97.84
7.69
11660
2.16
11.33
539727
10
1128970
95.29
16.45
55748
4.71
54.18
1184718
Total
6864318
102902
6967220
are quite similar. This is not unreasonable, since most women who are hospitalized for childbirth are, in
fact, quite healthy and do not have many co-morbidities. Healthier women are more likely to become
pregnant and to give birth, especially since women with severe diseases such as cancer are often advised
to terminate the pregnancy in order to treat their own diseases.
Therefore, we will remove all patients related to childbirth and re-evaluate the remaining patients.
In order to do this, we first look to the procedure codes. Codes from 72 through 75 represent obstetric
procedures; we filter out all patients with these procedures. Then we again examine the most frequent
codes in the two groups of patients, those with four or fewer listed, and those with five or more. Table
11 shows the revised list of diagnosis codes. For patients with five or more codes, the list in Table 11
changes only slightly; for 4 or fewer codes, it changes considerably.
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