An official website of the United States government
CONTENTS OF National Hospital Discharge Survey (NHDS) RESTRICTED FILES, 1988-present
| VARIABLE NAME | DESCRIPTION and VALUES | NOTE |
|---|---|---|
| SUR_YR | 4-digit designation for calendar year of data collection | |
| AGE | Age in Years, Months, or Days | |
| If years: 001 – 125 | ||
| If months: 01-11 | ||
| If days: 01-28 | ||
| UNITS | Units for Age | |
| 1 = Years | ||
| 2 = Months | ||
| 3 = Days | ||
| CENTURY | First 2 digits of year of birth of discharged patient (e.g. 19 for 1900’s) |
not edited |
| DOB | Date of birth of discharged patient (MMDDYY) | not edited |
| SEX | Sex | |
| 1 = Male | ||
| 2 = Female | ||
| RACE | Race of Patient | |
| Coding used in 2000-2006 | Coding used in 1988-1999 | |
| 1 = White | 1 = White | |
| 2 = Black or African American | 2 = Black | |
| 3 = American Indian/Alaskan Native | 3 = American Indian/Alaskan Native | |
| 4 = Asian | 4 = Asian/Pacific Islander | |
| 5 = Native Hawaiian/Oth Pacific Islder | 5 = Other | |
| 6 = Other race | 6 = Not Stated | |
| 7 = Race not stated | ||
| 8 = Mulitple race indicated | ||
| MARSTAT | Marital Status | |
| 1 = Married | ||
| 2 = Single | ||
| 3 = Widowed | ||
| 4 = Divorced | ||
| 5 = Separated | ||
| 6 = Not Stated | ||
| 7 = Unknown | ||
| DOA | Date of Admission (MMDDY) | not edited |
| Month of Admission (01-12) | ||
| Day of Admission (01-31) | ||
| Year of Admission (last digit) | ||
| DOD | Date of Discharge (MMDDY) | not edited |
| Month of Discharge (01-12) | ||
| Day of Discharge (01-31) | ||
| Year of Discharge (last digit) | ||
| DISCSTAT | Discharge Status | |
| 1 = Routine to Home | ||
| 2 = Left Against Medical Advice | ||
| 3 = Transf. to Short-Term Facility | ||
| 4 = Transf. to Long-Term Facility(MMDDY) | ||
| 5 = Alive, Not Stated | ||
| 6 = Dead | ||
| 7 = Status Not Stated | ||
| AGER4 | Age Recode, 4 Groups | |
| 1 = Under 15 | ||
| 2 = 15-44 | ||
| 3 = 45-64 | ||
| 4 = 65 & up | ||
| NUMDXS | Number of Diagnosis Codes (1 to 7) | |
| NUMPDS | Number of Procedure Codes (0 to 4) | |
| AGER10 | Age Recode, 10 groups | |
| 00 = Newborn Infant | ||
| 01 = Under 1 year | ||
| 02 = 1-4 years | ||
| 03 = 5-14 years | ||
| 04 = 15-24 years | ||
| 05 = 25-34 years | ||
| 06 = 35-44 years | ||
| 07 = 45-54 years | ||
| 08 = 55-64 years | ||
| 09 = 65-74 years | ||
| 10 = 75 years and older | ||
| REGION | Geographic Region | |
| 1 = Northeast | ||
| 2 = Midwest | ||
| 3 = South | ||
| 4 = West | ||
| BEDSIZE7 | Number of Beds Recode (Interview) | |
| 1 = 6-49 beds | ||
| 2 = 50-99 beds | ||
| 3 = 100-199 beds | ||
| 4 = 200-299 beds | ||
| 5 = 300-499 beds | ||
| 6 = 500-999 beds | ||
| 7 = 1000 or more beds | ||
| OWNER4 | Hospital Ownership (Interview) | |
| 1 = Proprietary | ||
| 2 = Church | ||
| 3 = Government | ||
| 4 = Nonprofit, excluding Church | ||
| DOC | Days of Care (LOS w/ ones) | Use to produce days of care estimates. Stays of less than one day have been recoded to 1 day stays. |
| ADMTYPE | Type of Admission | not available before 2001 |
| 1 = Emergency | ||
| 2 = Urgent | ||
| 3 = Elective | ||
| 4 = Newborn | ||
| 5 = Not available | ||
| ASOURCE | Source of Admission | not available before 2001 |
| 1 = Physician referral | ||
| 2 = Clinical referral | ||
| 3 = HMO referral | ||
| 4 = Transfer from a hospital | ||
| 5 = Transfer from SNF | ||
| 6 = Transfer from other health facility | ||
| 7 = Emergency room | ||
| 8 = Court/Law enforcement | ||
| 9 = Other | ||
| 0 = Not available | ||
| WEIGHT | Analysis Weight | |
| Final Adjusted Weight | ||
| ZIPCODE | Postal Service ZIPCODE for Patient’s Residence | |
| ESOP1 | Expected Source of Pymt, Principal Coding used 1998-2006 |
Coding used 1988-1987 |
| 01 = Worker’s Compensation | 1 = Worker’s Compensation | |
| 02 = Medicare | 2 = Medicare | |
| 03 = Medicaid | 3 = Medicaid | |
| 04 = Other Government Payments | 4 = Payment not stated | |
| 05 = Blue Cross/Blue Shiled | 5 = Other Government Payments | |
| 06 = HMO/PPO | 6 = Blue Cross/Blue Shield | |
| 07 = Other Private/Comm Insurance | 7 = Other Private/Comm Insurance | |
| 08 = Self Pay | 8 = Self Pay | |
| 09 = No Charge | 9 = No Charge | |
| 10 = Other | 0 = Other | |
| 99 = Not Stated | ||
| ESOP2 | Expected Source of Pymt, Secondary same coding as Principal ESOP |
|
| DOP1 | Date of Procedure #1 (MMDDY) | not edited |
| Month of Procedure #1 (01-12) | ||
| Day of Procedure #1 (01-31) | ||
| Year of Procedure #1 (last digit) | ||
| DOP2 | Date of Procedure #2 (MMDDY) same coding as DOP1 |
not edited |
| DOP3 | Date of Procedure #3 (MMDDY) same coding as DOP1 |
not edited |
| DOP4 | Date of Procedure #4 (MMDDY) same coding as DOP1 |
not edited |
| DX1 DX2 DX3 DX4 |
ICD9-CM Diagnosis Code #1 ICD9-CM Diagnosis Code #2 ICD9-CM Diagnosis Code #3 ICD9-CM Diagnosis Code #4 |
Diagnoses are coded to the ICD-9-CM. They have CHARACTER format. 5-digit codes have an implied decimal point between the 3rd and 4th digit. |
| DX5 | ICD9-CM Diagnosis Code #5 | From 1979-1995, V codes are identified with an equals [ = ] sign in the first position, instead of V |
| DX6 DX7 |
ICD9-CM Diagnosis Code #6 ICD9-CM Diagnosis Code #7 |
From 1979-1995, E codes are identified with a left parenthesis [ ) ] in the first position, instead of E |
| PD1 PD2 PD3 PD4 |
ICD9-CM Procedure Code #1 ICD9-CM Procedure Code #2 ICD9-CM Procedure Code #3 ICD9-CM Procedure Code #4 |
Procedures are coded to the ICD-9-CM. They have CHARACTER format. 4-digit codes have an implied decimal point between the 2rd and 3th digit. |
| POP2DIS | Population Count of Discharges w/in Hospital | |
| VSTRATA | Stratum Identifier | First digit of STRATA is TYPE, i.e. 1, 2, or 3; All 3 digits MUST be used in SUDAAN. |
| SUDOPSU | Pseudo PSU Identifer | |
| HOSPITAL | Hospital Identifier (NUMERIC) | |
| POPSPSU | Population Count in PseudoPSU | |
| POPHOS | Population Count of Hospitals w/in PSU |