Table 3.

Patient and anesthesia characteristics (N=593)^*

Characteristic	N (%)
ASA physical status‡
1	438 (73.9)
2	124 (20.9)
3	24 (4.0)
4	7 (1.2)
Age at first exposure, years
<1	195 (32.9)
1	155 (26.1)
2	131 (22.1)
3	112 (18.9)
Anesthetic exposures (N)
1	449 (75.7)
2	100 (16.9)
3–4	31 (5.2)
5–9	8 (1.3)
10 or more	5 (0.8)
Duration of anesthesia, minutes†
Mean ± SD	125 ± 227
Median (IQR)	75 (45, 120)

ASA, American Society of Anesthesiologists; IQR, interquartile range. N, number; %, percentage; SD, standard deviation.

^*Data related to anesthesia characteristics were available for all patients; for all patients

^‡For infants that underwent multiple anesthetics the highest ASA physical status is used. These 593 individuals underwent a total of 875 anesthetics (range 1 to 25 per person);

^†Data presented correspond to the cumulative total duration of anesthesia for each individual (N=593). The median duration per anesthetic (N=875) was 70 minutes (range 10 to 560).