Biostats part 2

t tests, anova

use these tests for continuous data

chi square

use thsi test for discrete data like nominal or ordinal

correlation

a statistical technique used to determine if 1 variable changes, or is related to another variable

-correlation does not prove a causal relationship

regression

used to describe the relationship between a dependent variable and one or more independent variables

-used to assess multiple independent variables

-or control for confounding factors

sensitivity

percentage of true positive results

specificity

percentage of true negative patients

case control

retrospective comparisons of cases and controls

cohort

retrospective or prospective comparisons of aptients with an exposure to those without an exposure

incremental cost effectiveness ratio

these represent the change in costs and outcomes when 2 treatments are ocmpared

(c2-c1)/(e2-e1)

cost minimization analysis

used when 2 or more interventions have demonstrated equivalence in outcomes and the costs of each intervention are being compared

cost benefit analysis

compares benefits and costs of an intervention in terms on monetary units

cost effectiveness analysis

used to compare clinical effects of 2 or more interventions to the respective costs

-most common

cost utility analysis

a specialized CEA that includes a quality of life component of morbidity assessments

(QALYs)