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Table 4 Secondary outcomes: subgroup analysis of an academic year of emergency medicine residency associated with examination scores

From: Factors associated with a basic common drug-drug interaction knowledge among emergency department medical personnel

Variables

Examination score of all-risk ratings (total of 40 points) a

Unadjusted

Mean difference

(95% CI)

p-value*

Academic year of an emergency medicine resident (n = 56)

   

 First year (n = 17)

18.8 ± 3.5

Ref

 

 Second year (n = 14) b

20.9 ± 3.9

2.1

(-1 to 5.2)

0.177

 Third year (n = 25) c

18.2 ± 4.8

-0.6

(-3.2 to 2.1)

0.674

  1. Abbreviations: Ref, reference; 95% CI, 95% confidence interval
  2. * p-value < 0.05 is statistically significant
  3. a Mean ± standard deviation and mean difference between groups were analyzed by regression analysis of means
  4. b Power-back calculations between the first year and the second year emergency medicine resident were analyzed and showed power as 0.33
  5. c Power-back calculations between the first year and the third year emergency medicine resident were analyzed and showed power as 0.07