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CHDA Test Review Book Terms Questions with Accurate Answers
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CHDA Test Review Book Terms
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CHDA Test Review Book TermsAlpha level - answer The level of Type I error that is deemed acceptable based on
context in statistical hypothesis testing. See Type I error.
Alternative hypothesis - answer The complement of the null hypothesis that is to be
tested using the appropriate statistical test. This hypothesis typically requires some
action to be taken.
Ambulatory payment classification (APC) - answer The payment unit used in the
hospital outpatient prospective payment system (OPPS). The classification is a
resource-based reimbursement system.
Analysis of variance - answerThe statistical tool used to compare more than two
population means. The null hypothesis tests that all of the population means are equal.
Analysis - answerReviewing and summarizing data for use in decision making.
Analytic study - answerA study where the analyst is able to investigate the relationship
between variables.
Auditing - answerThe performance of internal and external reviews to identify variations
from established baselines (for example, review of outpatient coding as compared with
CMS outpatient coding guidelines).
Average daily inpatient census - answerAn amount representing the inpatient service
days for a period divided by the number of days in a period.
Balanced design - answerAn experimental design where the number of subjects in each
sample are the same for all populations sampled. The term is relevant when performing
an analysis of variance or a two sample t-test.
Bell curve - answerThe shape of the normal distribution. The bell peaks at the average
and slopes down on both sides symmetrically.
Binomial variable - answerA variable that takes only two values (such as yes or no; alive
or dead). The probability of a yes or no is constant across all of the subjects, and the
outcome of each subject is independent of the others.
Case-control study - answerA study where the analyst-selected cases are those units of
analysis with the attribute to be studied and the controls are those without the attribute.
, Case Mix Index (CMI) - answerThe average relative weight of all cases treated at a
given facility or by a given physician, which reflects the resource intensity or clinical
severity of a specific group in relation to the other groups in the classification system;
calculated by dividing the sum of the weights of diagnosis-related groups for patients
discharged during a given period by the total number of patients discharged.\
Centers for Medicare and Medicaid Services (CMS) - answerThe division of the
Department of Health and Human Services that is responsible for developing healthcare
policy in the United States, for administering the Medicare program and the federal
portion of the Medicaid program, and maintaining the procedure portion of the
International Classification of Diseases, ninth revision, Clinical Modification (ICD-9-CM)
and International Classification of Diseases, tenth revision, Procedure Coding System
(ICD-10-PCS); called the Health Care Financing Administration (HCFA) prior to 2001.
Cesarean section rate - answerThe number of cesarean sections (or C-sections)
performed during the period of study, divided by the total number of deliveries (including
C-sections) for the same period.
Chi squared test - answerA statistical test that is used to test for relationships between
categorical variables. The null hypothesis for this test is that there is no association
between the two variables.
Cluster random sampling - answerThe population is divided into groups before the
sample is selected. The groups or clusters must be mutually exclusive and exhaustive.
(That is, every unit in the population is assigned to one and only one cluster.) Clusters
are then randomly selected to make up the sample. Cluster sampling may be performed
as single-stage or two-stage.
CMS-1500 - answer1. The universal insurance claim form developed and approved by
the American Medical Association (AMA) and the Centers for Medicare and Medicaid
Services (CMS) that physicians use to bill Medicare, Medicaid, and private insurers for
professional services provided 2. A Medicare claim form used to bill third-party payers
for provider services, for example, physician office visits.
Coefficient of determination - answerA statistic that measures the amount of variance in
a dependent variable explained by one or more independent variables. If there is one
independent variable, then this value is the Pearson Correlation Coefficient squared.
Cohort study - answerA study where the subjects with an attribute are matched with
those without the attribute based on demographics, but the subjects are followed over
time.
Confidence interval - answerAn interval that is centered at the sample estimate of a
population value that may be calculated so that it has a preset probability of containing
the population value.
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