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Table 1: Patient characteristics and radiation dose in CT protocols with various tube currents
Characteristic 320 mAs 275 mAs 225 mAs P
Age 63 ± 14 67 ± 13 66 ± 12 .54
Sex (male/female) 12/18 14/16 19/11 .17
CTDI_vol (mGy) 60.1 51.8 42.3 —
DLP (mGy.cm) 1043 ± 53 890 ± 34 733 ± 52 <.0001
Effective dose (mSv) 2.2 ± 0.1 1.8 ± 0.07 1.5 ± 1.0 <.0001

Characteristic	320 mAs	275 mAs	225 mAs	P
Age	63 ± 14	67 ± 13	66 ± 12	.54
Sex (male/female)	12/18	14/16	19/11	.17
CTDI_vol (mGy)	60.1	51.8	42.3	—
DLP (mGy.cm)	1043 ± 53	890 ± 34	733 ± 52	<.0001
Effective dose (mSv)	2.2 ± 0.1	1.8 ± 0.07	1.5 ± 1.0	<.0001