Table 2.

Baseline characteristics of resident participants; N = 34

Age — years (IQR)	29 (28 to 31)
Gender — n (%)
Female	13 (38)
Male	21 (62)
PGY status — n (%)
1st year resident	13 (38)
2nd year resident	13 (38)
3rd year resident	8 (24)
Usual daily caffeine intake* — n (%)
Less than one cup	11 (32)
One to three cups	19 (56)
Three or more cups	4 (12)
Caffeine intake* on simulation day — n (%)
Less than one cup	15 (44)
One to three cups	16 (47)
Three or more cups	3 (8)
Baseline heart rate† — median beats per min (IQR)	70 (62 to 78)

*Expressed in cups of regular coffee or its equivalent (i.e. 100 mg caffeine).

^†Measured during academic conference, not on simulation day.