Table 2.

Radiation dose to all of the roles.

Occupation	Radiation dose during 3 months (mSv)	Estimated annual dose (mSv)	p value∗
Nurse (18)	0.22 ± 0.01	0.88 ± 0.05	p < 0.001#
Doctor (22)	0.24 ± 0.04	0.99 ± 0.16
Resident (14)	0.26 ± 0.04	1.04 ± 0.18 ∗∗	p < 0.001##
Attending (8)	0.22 ± 0.02	0.90 ± 0.10	p = 0.012†
Total (40)	0.23 ± 0.03	0.94 ± 0.14	p = 0.002††

∗: comparison of estimated annual doses.

∗∗: the estimated annual dose to resident is higher than the limit ICRP recommended for the public.

#: t-test between nurse and doctor.

##: post hoc test between resident and nurse.

†: post hoc test between attending and resident.

††: ANOVA test among nurse, resident, and attending.