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J Gen Intern Med. 2005 Nov;20(11):996-1000.

Patients and medical statistics. Interest, confidence, and ability.

Author information

1
The VA Outcomes Group (111B), Department of Veterans Affairs Medical Center, White River Junction, Vt 05009, USA. steven.woloshin@dartmouth.edu

Abstract

BACKGROUND:

People are increasingly presented with medical statistics. There are no existing measures to assess their level of interest or confidence in using medical statistics.

OBJECTIVE:

To develop 2 new measures, the STAT-interest and STAT-confidence scales, and assess their reliability and validity.

DESIGN:

Survey with retest after approximately 2 weeks.

SUBJECTS:

Two hundred and twenty-four people were recruited from advertisements in local newspapers, an outpatient clinic waiting area, and a hospital open house.

MEASURES:

We developed and revised 5 items on interest in medical statistics and 3 on confidence understanding statistics.

RESULTS:

Study participants were mostly college graduates (52%); 25% had a high school education or less. The mean age was 53 (range 20 to 84) years. Most paid attention to medical statistics (6% paid no attention). The mean (SD) STAT-interest score was 68 (17) and ranged from 15 to 100. Confidence in using statistics was also high: the mean (SD) STAT-confidence score was 65 (19) and ranged from 11 to 100. STAT-interest and STAT-confidence scores were moderately correlated (r=.36, P<.001). Both scales demonstrated good test-retest repeatability (r=.60, .62, respectively), internal consistency reliability (Cronbach's alpha=0.70 and 0.78), and usability (individual item nonresponse ranged from 0% to 1.3%). Scale scores correlated only weakly with scores on a medical data interpretation test (r=.15 and .26, respectively).

CONCLUSION:

The STAT-interest and STAT-confidence scales are usable and reliable. Interest and confidence were only weakly related to the ability to actually use data.

PMID:
16307623
PMCID:
PMC1490265
DOI:
10.1111/j.1525-1497.2005.00179.x
[Indexed for MEDLINE]
Free PMC Article

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