Exhibit 2.1. Most Frequent Principal Diagnoses
Number of Discharges, Percent Distribution, and Rank of Most Frequent Principal Diagnoses for Inpatient Hospital Stays, 1997, 2004, 2005
| Principal Diagnosis CCS Condition Category and Name |
Number of Discharges in Thousands |
Standard Errors in Thousands |
Percent of Discharges |
Rank |
| 1997 |
2004 |
2005 |
1997 |
2004 |
2005 |
1997 |
2004 |
2005 |
1997 |
2004 |
2005
| All discharges |
34,678.7 |
38,661.8 |
39,163.8 |
653.509 |
707.463 |
765.017 |
100.0 |
100.0 |
100.0 |
|
|
|
| 300 |
Pregnancy, childbirth, and infants |
8,236.9 |
9,174.5 |
9,145.5 |
283.653 |
303.656 |
328.803 |
23.8 |
23.7 |
23.4 |
1 |
1 |
1 |
| 122 |
Pneumonia (except that caused by tuberculosis or sexually transmitted disease) |
1,231.6 |
1,213.5 |
1,355.4 |
21.213 |
20.900 |
28.885 |
3.6 |
3.1 |
3.5 |
3 |
2 |
2 |
| 101 |
Coronary atherosclerosis (coronary artery disease) |
1,407.0 |
1,192.4 |
1,109.6 |
55.998 |
48.974 |
49.551 |
4.1 |
3.1 |
2.8 |
2 |
3 |
3 |
| 108 |
Congestive heart failure, nonhypertensive |
991.3 |
1,104.4 |
1,090.2 |
21.379 |
24.605 |
25.445 |
2.9 |
2.9 |
2.8 |
4 |
4 |
4 |
| 102 |
Non-specific chest pain |
537.6 |
845.7 |
824.7 |
16.414 |
24.007 |
32.264 |
1.6 |
2.2 |
2.1 |
10 |
5 |
5 |
| 203 |
Osteoarthritis (degenerative joint disease) |
417.7 |
659.4 |
738.4 |
14.805 |
28.094 |
29.757 |
1.2 |
1.7 |
1.9 |
17 |
9 |
6 |
| 657 |
Mood disorders (depression and bipolar disorder) |
640.6 |
792.4 |
713.4 |
33.422 |
45.129 |
43.740 |
1.8 |
2.0 |
1.8 |
6 |
6 |
7 |
| 106 |
Cardiac dysrhythmias (irregular heart beat) |
572.3 |
693.7 |
696.6 |
14.345 |
17.764 |
19.444 |
1.7 |
1.8 |
1.8 |
8 |
8 |
8 |
| 100 |
Acute myocardial infarction (heart attack) |
732.2 |
695.1 |
662.3 |
22.074 |
22.378 |
23.745 |
2.1 |
1.8 |
1.7 |
5 |
7 |
9 |
| 205 |
Spondylosis, intervertebral disc disorders, other back problems (disorders of intervertebral discs and bones in spinal column) |
536.3 |
615.7 |
647.0 |
19.986 |
22.812 |
28.728 |
1.5 |
1.6 |
1.7 |
11 |
10 |
10 |
| 127 |
Chronic obstructive pulmonary disease and bronchiectasis (chronic obstructive lung disease) |
551.3 |
555.5 |
630.1 |
11.458 |
11.434 |
14.873 |
1.6 |
1.4 |
1.6 |
9 |
12 |
11 |
| 237 |
Complication of medical device, implant or graft |
491.5 |
601.2 |
615.9 |
18.723 |
20.750 |
22.043 |
1.4 |
1.6 |
1.6 |
12 |
11 |
12 |
| 197 |
Skin and subcutaneous tissue infections |
329.8 |
505.4 |
582.2 |
7.195 |
10.890 |
13.963 |
1.0 |
1.3 |
1.5 |
24 |
16 |
13 |
| 55 |
Fluid and electrolyte disorders (primarily dehydration or fluid overload) |
468.2 |
554.6 |
573.8 |
10.033 |
11.442 |
13.741 |
1.4 |
1.4 |
1.5 |
13 |
13 |
14 |
| 2 |
Septicemia (blood infection) |
413.1 |
451.8 |
537.7 |
10.116 |
11.528 |
16.859 |
1.2 |
1.2 |
1.4 |
18 |
21 |
15 |
| All maternal discharges |
4,337.9 |
4,763.2 |
4,716.5 |
149.892 |
154.323 |
167.706 |
100.0 |
100.0 |
100.0 |
| 193 |
Trauma to external female genitals (vulva) and area between anus and vagina (perineum), related to
childbirth |
713.0 |
785.1 |
784.5 |
29.323 |
33.642 |
36.341 |
16.4 |
16.5 |
16.6 |
1 |
1 |
1 |
| 189 |
Previous C-section |
271.3 |
455.9 |
481.1 |
10.248 |
17.234 |
19.639 |
6.3 |
9.6 |
10.2 |
6 |
4 |
4 |
| 196 |
Normal pregnancy and/or delivery |
544.2 |
337.7 |
324.8 |
19.897 |
13.479 |
13.532 |
12.5 |
7.1 |
6.9 |
2 |
5 |
5 |
| 184 |
Early or threatened labor |
261.3 |
255.4 |
236.3 |
11.618 |
9.865 |
9.705 |
6.0 |
5.4 |
5.0 |
7 |
6 |
6 |
| 190 |
Fetal distress and abnormal forces of labor |
420.0 |
247.3 |
233.7 |
20.187 |
11.601 |
9.725 |
9.7 |
5.2 |
5.0 |
3 |
7 |
7 |
| 185 |
Prolonged pregnancy |
103.9 |
218.5 |
233.6 |
5.457 |
10.061 |
12.588 |
2.4 |
4.6 |
5.0 |
13 |
10 |
8 |
| 183 |
Hypertension complicating pregnancy, childbirth and the puerperium (high blood pressure during
pregnancy) |
185.3 |
223.5 |
220.3 |
7.941 |
8.737 |
8.652 |
4.3 |
4.7 |
4.7 |
10 |
9 |
9 |
| 192 |
Umbilical cord complication |
259.2 |
234.7 |
216.7 |
11.723 |
9.366 |
8.676 |
6.0 |
4.9 |
4.6 |
8 |
8 |
10 |
| 191 |
Polyhydramnios and other problems of amniotic cavity (excess amniotic fluid and other problems of
amniotic cavity) |
202.4 |
192.4 |
191.4 |
8.868 |
8.680 |
10.915 |
4.7 |
4.0 |
4.1 |
9 |
11 |
11 |
| All infant discharges |
3,899.0 |
4,411.3 |
4,429.0 |
120.170 |
128.694 |
146.391 |
100.0 |
100.0 |
100.0 |
| 218 |
Liveborn (newborn infant) |
3,777.4 |
4,249.3 |
4,228.4 |
130.188 |
144.869 |
157.113 |
96.9 |
96.3 |
95.5 |
1 |
1 |
1 |
| 224 |
Other perinatal conditions (other conditions occurring around the time of birth) |
56.4 |
72.3 |
94.4 |
4.462 |
8.897 |
11.880 |
1.4 |
1.6 |
2.1 |
2 |
2 |
2 |
| 222 |
Hemolytic jaundice and perinatal jaundice (infant jaundice following birth) |
33.1 |
46.9 |
56.7 |
1.622 |
2.609 |
3.224 |
0.8 |
1.1 |
1.3 |
3 |
3 |
3 |
| 219 |
Short gestation, low birth weight, and fetal growth retardation (premature birth and low birth weight) |
22.2 |
25.3 |
31.2 |
1.887 |
3.323 |
4.004 |
0.6 |
0.6 |
0.7 |
4 |
4 |
4 |
| 221 |
Infant respiratory distress syndrome |
8.2 |
15.9 |
16.3 |
1.280 |
3.465 |
3.507 |
0.2 |
0.4 |
0.4 |
5 |
5 |
5 |
| 223 |
Birth trauma |
0.8 |
0.9 |
1.0 |
0.113 |
0.164 |
0.165 |
0.0 |
0.0 |
0.0 |
7 |
6 |
6 |
| 220 |
Intrauterine hypoxia and birth asphyxia (lack of oxygen to baby in uterus or during birth) |
0.9 |
0.7 |
1.0 |
0.137 |
0.120 |
0.167 |
0.0 |
0.0 |
0.0 |
6 |
7 |
7 |
| Source: AHRQ, Center for Delivery, Organization, and Markets, Healthcare Cost and Utilization Project, Nationwide Inpatient Sample, 1997, 2004 and 2005. |