Numeracy and the medical student's ability to interpret data.

Area of Science:

• Medical Education
• Health Literacy
• Quantitative Reasoning

Background:

• Physician numeracy, or basic skill with numbers, is vital for medical practice but poorly understood.
• Limited knowledge exists regarding medical students' fundamental numerical abilities.

Purpose of the Study:

• To assess the numeracy skills of first-year medical students.
• To determine the relationship between numeracy and the ability to interpret risk-reduction information presented in various formats.

Main Methods:

• A randomized, cross-sectional survey was administered to 62 first-year medical students.
• Students completed numeracy questions and data interpretation tasks after viewing risk-reduction information in four formats: relative risk reduction, absolute risk reduction, number needed to treat (NNT), or a combination.

Main Results:

• While 77% of students answered all three numeracy questions correctly, only 61% accurately interpreted quantitative risk data.
• A strong correlation was found between higher numeracy scores and accurate quantitative data interpretation (71% vs. 36% vs. 0%).
• The number needed to treat (NNT) format resulted in significantly lower correct quantitative interpretation (25%) compared to other formats (75%).

Conclusions:

• A notable percentage of first-year medical students exhibit deficits in basic numerical tasks, hindering their medical data interpretation skills.
• Presenting risk information using the number needed to treat (NNT) format may impede accurate quantitative understanding.
• Enhancing numeracy and optimizing data presentation are essential for improving medical students' risk communication abilities.