Probability of using a checklist at least 50% of the time 95th percent confidence interval Sample size Chi-square p-value
Years since residency
>20 years 0.46 0.32 - 0.61 41 0.194
<20 years 0.62 0.45 - 0.79 29  
Use of timeouts
Yes 0.60 0.48 - 0.73 53 0.071
No 0.35 0.15 - 0.56 17  
Practice settings
Hospital 0.44 0.26 - 0.62 25 0.269
Outpatient center 0.58 0.44 - 0.72 45  
Use during residency
Yes 0.83 0.65 - 1.02 12 0.023
No 0.47 0.35 - 0.60 59  
Belief in enhancement in safety
Yes 0.68 0.55 - 0.81 47 0.001
No 0.26 0.09 - 0.43 23  
The likelihood of the survey respondent using a checklist based on responses to a particular survey question using Chi-Square Statistic.
Table 2: Responses to survey questions vs. frequency of use of checklists.