RHIT Statistics & Formulas
What term would be applied to a comparison of the number of female
patients to the number of male
patients who were discharged from MS-DRG YYY?
Suppose that there are six males in a class of twenty students. What
term could be used to
describe the comparison?
What descriptive statistics is calculated by applying this equation: (x/y) x 10n?
In May, 270 women were admitted to the Obstetrics service. Of these,
263 women delivered; 33
deliveries were by C-section. What is the denominator for calculating the C-section rate?
Suppose that you want to display the number of deaths due to breast
cancer for the years 1990
through 1999. What graphic technique would you choose?
Suppose that you want to display the average length of stay by gender
and service for the month of
August. What graphic technique would you choose?
If you are interested in displaying the parts of a whole in graphic
form, what graphic technique
would you use?
In a frequency distribution, the lowest value is 5 and the highest value is 20. What is the range?
I just realized that we may be misleading administration with the
data we provided them.
What might we have done?
Failed to adjust the baseline
Agency for Healthcare Research and Quality
What rates would adequately describe the observed number of deaths in a community?
20/100,000 in January 2000
2/1,000 in January 2000
What rate describes the number of new cases of an illness for a specific time period?
What term is used to describe the number of inpatients present at the
census- taking time each
day plus the number of inpatients who were both admitted and discharged after the census-taking time
the previous day?
Daily inpatient census
What unit of measure is used to indicate the services received by one
inpatient in a 24-hour
Inpatient service day
What rate is used to compare the number of inpatient deaths to the
total number of inpatient
deaths and discharges?
Gross hospital death rate
Suppose a patient who underwent orthopedic surgery acquired
Klebsiella pneumonia while
hospitalized. How could this illness be described?
As a postoperative infection
As a hospital-acquired infection
As a community acquired infection
What term is used to describe the number of calendar days that a patient is hospitalized?
Length of stay
What rate is used to indicate the percentage of the hospital’s beds
occupied by inpatients for a
given time period?
Total length of stay
Inpatient bed occupancy rate
What rate compares the number of autopsies performed on hospital
inpatients to the total
number of inpatient deaths for the same period of time?
Gross autopsy rate
Suppose that five patients stayed in the hospital for a total of 27
days. Which term would be used
to describe the result of the calculation 27 ÷ 5?
Average length of stay
The probability of death among diagnosed cases of a specific disease is termed:
case fatality rate
What data elements are considered protected under the HIPAA Privacy Rule?
Patient telephone number
Medical record number
Full-time equivalent employee
Annual compensation =
hours X per hour X % benefits
Amount of work completed X number or work days per year
(5 workdays per week X 52 weeks per year)
Unit labor costs:
Compensation / productivity
Completed work = total work output – defective work
Labor productivity = completed work / hours worked to produce total work output
(Work output / total hours worked)
Patient encounters / productivity = number of FTE’s needed
(Inpatients per day / records coded per day)
Minutes X records = total minutes
Total minutes / 60 minutes (hours) = total hours
Total hours / productive hours = FTE’s needed
Budgeted – actual = variance
(Variance x 100) / budgeted = % over or under budget
Capital budget (high dollar assets)
Total cost of project / Annual incremental cash flow
(Annual incremental cash flow refers to the savings that a development realizes from the project)
Return on investment (ROI)
(Average annual incremental cash flow X 100) / Total cost of the project
Case Mix index
(The average relative weight of all cases treated at a given facility or by a given physician. Case mix is always reported with four decimal points)
Sum of the weights of MSDRG’s for patients discharged during a given period / total number of patients discharged
(Number of time something happened X 100) / number of times something could have happened
inches per shelf × shelves per unit = linear filing inches per unit
records × 1 inch per record = inches of records to be filed
(inches of records needed) / inches per unit = filing units
New file folders needed for next year
admissions (year currently) + additional admissions/year = total admissions next year
total admissions X % readmission rate = readmissions next year
total admissions - readmissions = new file folders needed for next year
Budget allocation for storage space
inpatients × inch per record = total inpatient inches
ER patients × inch per record = total ER inches
Inpatient inches + ER inches = total inches of filing space per year
total inches × $ per filing inch = $ budget allocation for storage space