ANALYTICAL, DIAGNOSTIC AND THERAPEUTIC TECHNIQUES, AND EQUIPMENT Diagnosis [E01] Diagnosis Diagnostic Errors [E01.354] Diagnostic Errors False Negative Reactions [E01.354.340] False Negative Reactions False Positive Reactions [E01.354.506] False Positive Reactions Observer Variation [E01.354.753] Observer Variation HEALTH CARE Health Care Facilities, Manpower, and Services [N02] Health Care Facilities, Manpower, and Services Health Services [N02.421] Health Services Medical Errors [N02.421.450] Medical Errors Diagnostic Errors [N02.421.450.280] Diagnostic Errors Medication Errors [N02.421.450.500] Medication Errors Near Miss, Healthcare [N02.421.450.550] Near Miss, Healthcare Observer Variation [N02.421.450.600] Observer Variation Radiotherapy Setup Errors [N02.421.450.800] Radiotherapy Setup Errors HEALTH CARE Health Care Quality, Access, and Evaluation [N05] Health Care Quality, Access, and Evaluation Quality of Health Care [N05.715] Quality of Health Care Epidemiologic Factors [N05.715.350] Epidemiologic Factors Bias [N05.715.350.150] Bias Observer Variation [N05.715.350.150.675] Observer Variation Selection Bias [N05.715.350.150.775] Selection Bias HEALTH CARE Environment and Public Health [N06] Environment and Public Health Public Health [N06.850] Public Health Epidemiologic Factors [N06.850.490] Epidemiologic Factors Bias [N06.850.490.500] Bias Observer Variation [N06.850.490.500.250] Observer Variation Selection Bias [N06.850.490.500.500] Selection Bias

Observer Variation - Preferred

Concept UI	M0023933
Scope note	The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
Preferred term	Observer Variation
Entry term(s)	Bias, Observer Observer Bias Observer Variations Variation, Observer Variations, Observer

Interobserver Variation - Narrower

Concept UI	M0023931
Preferred term	Interobserver Variation
Entry term(s)	Inter Observer Variability Inter Observer Variation Inter-Observer Variabilities Inter-Observer Variability Inter-Observer Variation Inter-Observer Variations Interobserver Variabilities Interobserver Variability Interobserver Variations Variabilities, Inter-Observer Variabilities, Interobserver Variability, Inter-Observer Variability, Interobserver Variation, Inter-Observer Variation, Interobserver Variations, Inter-Observer Variations, Interobserver

Intraobserver Variation - Narrower

Concept UI	M0023932
Preferred term	Intraobserver Variation
Entry term(s)	Intra Observer Variability Intra Observer Variation Intra-Observer Variabilities Intra-Observer Variability Intra-Observer Variation Intra-Observer Variations Intraobserver Variabilities Intraobserver Variability Intraobserver Variations Variabilities, Intra-Observer Variabilities, Intraobserver Variability, Intra-Observer Variability, Intraobserver Variation, Intra-Observer Variation, Intraobserver Variations, Intra-Observer Variations, Intraobserver