Diagnostic test data are characterized by which two properties?

Diagnostic test data are characterized by which two properties?

• A. Objective and qualitative
• B. Subjective and qualitative
• C. Subjective and quantitative
• D. Objective and quantitative

Answer: (D)

Diagnostic test data are best described as objective and quantitative. Objective means the results come from standardized, instrument-based measurements rather than personal opinions or interpretation, which reduces bias and ensures reproducibility across observers and settings. Quantitative means the results are expressed as numerical values with units, enabling precise comparisons and statistical analysis, as well as calculations of performance metrics like sensitivity, specificity, and ROC curves. Examples include blood glucose in mg/dL, viral load in copies/mL, or lesion size in centimeters. Data that are subjective or qualitative rely on non-numeric impressions, which introduces variability and limits rigorous analysis.

Diagnostic test data are best described as objective and quantitative. Objective means the results come from standardized, instrument-based measurements rather than personal opinions or interpretation, which reduces bias and ensures reproducibility across observers and settings. Quantitative means the results are expressed as numerical values with units, enabling precise comparisons and statistical analysis, as well as calculations of performance metrics like sensitivity, specificity, and ROC curves. Examples include blood glucose in mg/dL, viral load in copies/mL, or lesion size in centimeters. Data that are subjective or qualitative rely on non-numeric impressions, which introduces variability and limits rigorous analysis.