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Table 2 Proportions of correct and incorrect answers for the 28 key feature items, calculated across the two e-seminars, and exit exam and the retention test

From: How can we teach medical students to choose wisely? A randomised controlled cross-over study of video- versus text-based case scenarios

Diseases

Key features (Items)

Proportion of correct answers

Frequent or relevant incorrect answers (proportion)

Pulmonary embolism

Diagnosis of pulmonary embolism

58.6%

Acute coronary syndrome (8.0%); aortic dissection (3.9%)

Wells Score to assess likelihood of PE

74.0%

Assessment of hemodynamic stability (5.2%)

Thorax CT scan to confirm PE in a patient with high clinical probability

50.0%

Thrombolysis without confirmation (17.7%); other imaging (9.7%); D-dimer testing (9.7%)

Right ventricular strain for risk stratification

51.9%

 

Fibrinolysis for unstable pulmonary embolism

66.6%

Other medical treatment (10.2%)

Arterial hypertension

Diagnosis of secondary hypertension

49.6%

Essential hypertension (11.5%); cardiac disease (10.4%)

Diagnosis of diastolic dysfunction

17.5%

Other myocardial disease (60.8%)

Discontinuation of ACE inhibitors due to typical cough

93.7%

 

Hyponatremia

Hospital admission for chronic symptomatic hyponatremia

70.5%

Rapid sodium supplementation (11.0%)

Thiazide diuretics as cause of hyponatremia

83.0%

Hypovolemia (3.4%)

Diagnosis of central pontine myelinolysis following rapid sodium supplementation

64.9%

Cerebral oedema (13.6%)

Atrial fibrillation

Orthostatic challenge after syncope

72.5%

Tilt testing (22.8%)

ECG diagnosis of tachyarrhythmia

61.8%

Conduction blocks (13.7%); myocardial infarction (1.9%)

CHA2DS2-VASc score for anticoagulation

83.6%

 

Lupus erythematosus

Diagnosis of nephrotic syndrome

80.3%

Nephritic syndrome (8.0%)

Diagnosis of systemic lupus erythematosus

83.8%

Non-specific glomerulonephritis (4.3%)

Renal biopsy to confirm lupus nephritis

79.8%

Imaging (4.6%)

COPD

Diagnosis of COPD

91.1%

 

Confirmation of COPD by FEV1/VC < 70%

64.7%

FEV1 (13.6%); FEV1/VC % predicted (15.8%)

ABG analysis for suspected CO2 intoxication

67.2%

Imaging (7.2%)

Treatment of CO2 intoxication by non-invasive ventilation

53.3%

Oxygen (16.9%); CPAP (11.4%); buffering (6.7%)

Pneumonia

Diagnosis of left apical pneumonia in a chest X-ray

72.8%

Incorrect or no localisation (23.3%)

Decision on hospitalisation based on the CRB-65 score

75.9%

Decision based on additional laboratory tests (5.6%)

Hyperthyroidism

Diagnosis of hyperthyroidism from lab results

88.8%

Hypothyroidism (4.1%)

Stopping amiodarone in a pt. with hyperthyroidism

66.2%

other medical (11.4%) or surgical (5.7%) treatment

Pulmonary fibrosis

Diagnosis of pulmonary fibrosis

53.8%

Pulmonary oedema (12.5%); pneumonia (9.4%)

Amiodarone as cause of pulmonary fibrosis

78.9%

Atrial fibrillation (4.8%)

Indication for long-term oxygen therapy

47.6%

Mechanical ventilation (24.2%)

  1. ABG arterial blood gases, ACE angiotensin converting enzyme, CAD coronary artery disease, CHA2DS2-VASc congestive heart failure, hypertension, age ≥75 (doubled), diabetes, stroke (doubled), vascular disease, age 65–74, and sex category (female), CO2 carbon dioxide, COPD chronic obstructive pulmonary disease, CPAP continuous positive airway pressure, CRB confusion/respiratory rate/blood pressure, CT computed tomography, ECG electrocardiogram, FEV1 forced expiratory volume in 1 s, NIV non-invasive ventilation, PAD peripheral artery disease, PE pulmonary embolism, VC vital capacity
  2. Italics indicate the key feature assessed in each item; answers that were frequently entered instead of these are shown in the last column of the table