Table 2. Dose report and comparison for different kV settings.

Scan parameter
High pitch (n = 81)	Overall	70 kV	80 kV	90 kV	p-value
Effective tube current (mAs)	505 ± 91	462 ±98	539 ± 67	539 ± 79	0.001†
CTDIvol (mGy)	2.2 ± 1.0	1.3 ± 0.3	2.5 ± 0.3	3.8 ± 0.6	<0.001†
DLP (mGy*cm)	72 ± 24	51 ± 8	80 ± 8	111 ± 16	<0.001†
Effective dose (mSv)	0.7 ± 0.3	0.5 ± 0.1	0.8 ± 0.2	1.1 ± 0.2	<0.001†
AS (n = 33)
Effective tube current (mAs)	347 ± 71	336 ± 79	396 ± 26	346 ± 15	0.237
CTDIvol (mGy)	10.6 ± 5.1	8.2 ± 2.4	14.3 ± 2.6	20.9 ± 3.4	<0.001†
DLP (mGy*cm)	171 ± 75	135 ± 33	238 ± 53	309 ± 63	<0.001†
Effective dose (mSv)	3.3 ± 1.9	2.5 ± 0.9	5.1 ± 2.7	5.8 ± 2.1	0.002†

Note–Values are presented as means ± standard deviation.

High pitch = prospective ‘high pitch’ scan protocol; AS = prospective ‘adaptive sequence’ scan protocol; CTDI = CT dose index; DLP = dose length product.

^†Kruskal-Wallis test showed significance between kV settings.