|
Sex (reference female)
|
|
Male
|
2.14
|
0.94–4.90
|
0.070
|
|
Region (reference Midwest)
|
|
Northeast
|
3.49
|
0.97–12.56
|
0.056
|
|
West
|
3.67
|
0.99–13.50
|
0.051
|
|
South
|
2.90
|
0.74–11.45
|
0.128
|
|
Lectures (reference did not use)
|
|
Not very useful
|
0.60
|
0.10–3.61
|
0.578
|
|
Extremely/moderately useful
|
1.42
|
0.13–4.85
|
0.795
|
|
Group study (reference did not use)
|
|
Not very useful
|
3.40
|
1.16–9.94
|
0.026
|
|
Extremely/moderately useful
|
0.67
|
0.53–3.78
|
0.481
|
|
Incentives (reference no)
|
|
Yes
|
2.75
|
1.16–6.56
|
0.022
|
|
Average number of hours per week spent studying
|
1.09
|
1.01–1.17
|
0.026
|
|
Average number of hours spent in research 3 months prior to exam
|
0.93
|
0.87–0.99
|
0.020
|
|
Step 1
|
2.48
|
1.68–3.64
|
< 0.001
|
