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Table 8. NIS and NHDS Comparisons by Primary Diagnoses Ranked by NIS Data, 1995

Rank1 CCHPR Category2

Number of Discharges in Thousands
(Standard Error)

Average Length of Stay in Days
(Standard Error)

In-Hospital Mortality
Rate: Percent
(Standard Error)
NIS NHDS NIS NHDS NIS NHDS
1 218: Liveborn 3,843
(114)		 3,621
(123)		 2.78
(.05)		 2.78
(.16)		 .34
(.01)		 .38
(.08)
2 101: Coronary atherosclerosis 1,387
(45)		 1,303
(49)		 4.72
(.11)		 4.42
(.26)		 .97
(.02)		 .95
(.20)
3 122: Pneumonia (except that caused by tuberculosis and sexually transmitted diseases) 1,268
(18)		 1,261
(48)		 6.89
(.06)		 6.75
(.40)		 6.39
(.10)		 5.97
(.49)
4 108: Congestive heart failure, nonhypertensive 942
(15)		 880
(36)		 6.95
(.31)		 6.35
(.39)		 5.62
(.06)		 4.69
(.53)
5 100: Acute myocardial infarction 720
(17)		 766
(32)		 6.52
(.06)		 6.61
(.41)		 9.49
(.11)		 9.93
(.80)
6 193: Trauma to perineum and vulva 657**
(20)		 2
(1)		 1.56a
(.02)		 1.47
(b)		 0.0a
(0.0)		 0.0
(b)
7 109: Acute cerebrovascular disease 622*
(9)		 554
(25)		 8.58
(.14)		 8.38
(.55)		 11.28
(.14)		 11.65
(1.01)
8 196: Normal pregnancy and/or delivery 611**
(21)		 3,763
(128)		 1.53**
(.01)		 2.12
(.12)		 0.0
(0.0)		 .02
(.02)
9 69: Affective disorders 557
(23)		 621
(27)		 10.38
(.26)		 9.79
(.62)		 .10
(.02)		 .06
(.07)
10 106: Cardiac dysrhythmias 554
(10)		 559
(25)		 4.14
(.05)		 4.10
(.28)		 1.26
(.03)		 1.11
(.33)
11 127: Chronic obstructive pulmonary disease and bronchiectasis 516
(8)		 553
(25`)		 6.43
(.10)		 6.15
(.41)		 3.18
(.07)		 3.28
(.56)
12 205: Spondylosis and back problems 507
(15)		 515
(23)		 3.74
(.06)		 3.78
(.27)		 .18
(.01)		 .28
(.17)
13 102: Nonspecific chest pain 501**
(11)		 73
(7)		 2.16a
(.02)		 1.54
(b)		 .08a
(.01)		 .53
(b)
14 149: Biliary tract disease 494
(8)		 509
(23)		 4.86
(.04)		 4.33
(.30)		 .81
(.03)		 .61
(.26)
15 55: Fluid and electrolyte disorders 481**
(10)		 571
(25)		 4.87
(.06)		 4.71
(.32)		 3.41
(.10)		 3.52
(.57)
16 237: Complication of device, implant or graft 459
(14)		 412
(20)		 6.56
(.10)		 6.21
(.44)		 1.99
(.04)		 1.25
(.40)
17 128: Asthma 443*
(13)		 506
(23)		 3.84
(.04)		 3.71
(.26)		 .43
(.02)		 .23
(.16)
18 190: Fetal distress and abnormal forces of labor 422**
(20)		 4
(2)		 2.36a
(.04)		 1.37
(b)		 0.0a
(0.0)		 0.0
(b)
19 50: Diabetes mellitus with complications 410
(9)		 407
(20)		 6.68
(.16)		 6.59
(.46)		 1.71
(.05)		 2.23
(.54)
20 159: Urinary tract infections 400*
(7)		 444
(21)		 5.50 5.50
(.39)		 1.84
(.05)		 2.59
(.56)
21 203: Osteoarthritis 385
(11)		 354
(18)		 5.85
(.10)		 5.98
(.44)		 .24a
(.01)		 .05
(b)
22 2: Septicemia (except labor) 378**
(7)		 308
(16)		 8.81
(.09)		 8.69
(.64)		 14.07
(.17)		 14.81
(1.50)
23 195: Other complications of birth, puerperium affecting management of the mother 370**
(12)		 52
(6)		 2.12a
(.04)		 2.52
(b)		 .03a
(.01)		 0.0
(b)
24 181: Other complications of pregnancy 352**
(12)		 161
(11)		 2.32
(.04)		 2.68
(.29)		 .03a
(.01)		 0.0
(b)
25 45: Maintenance chemotherapy, radiotherapy 291**
(14)		 112
(9)		 3.83
(.08)		 3.89
(.44)		 .71
(.04)		 .60
(.54)

1 NIS rank is based on number of discharges.
2 Diagnoses classified according to Clinical Classifications for Health Policy Research, Version 2 (Elixhauser and McCarthy, 1996)
a A significance test was not performed because a valid standard error was not available.
b The NHDS sample size was too small to calculate a valid estimate of standard error.
* Difference is significant at the 0.05 level.
** Difference is significant at the 0.01 level.

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Page last reviewed December 2012
Page originally created December 2012
Internet Citation: Table 8. NIS and NHDS Comparisons by Primary Diagnoses Ranked by NIS Data, 1995. Content last reviewed December 2012. Agency for Healthcare Research and Quality, Rockville, MD. https://archive.ahrq.gov/research/data/hcup/nhds/comptb8.html

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