Table 4. Serial Change in IVUS measures and calcium degree in overall patients and propensity-matched patients.

	Overall patients			Propensity matched patients
	Caucasians (n=3309)	African-Americans (n=170)	P-value	Caucasians (n=417)	African-Americans (n=139)	P-value
Atheroma volume (mm³)†	–3.06 (±1.66)	0.51 (±2.14)	0.01	–3.71 (±1.69)	0.13 (±2.10)	0.02
Percent atheroma volume (%)†	0.3 (±0.22)	0.36 (±0.30)	0.91	0.35 (±0.20)	0.39 (±0.28)	0.86
EEM volume (mm³)†	–13.64 (±2.58)	–5.79 (±4.03)	0.01	–13.41 (±3.43)	–7.59 (±4.61)	0.18
Lumen volume (mm³)†	–10.14 (± 1.04)	–6.46 (±2.63)	0.14	–9.62 (±1.87)	–8.03 (±3.02)	0.63
Calcium degree
Baseline percentage of images containing calcium (%)†	30.4 (±24.4)	20.7 (±21.3)	<0.001	21.1 (±21.6)	20.9 (±21.3)	0.92
Change in percentage of images containing calcium (%)#	1.08 (±0.01)	0.58 (±0.06)	<0.001	0.60 (±0.04)	0.25 (±0.07)	<0.001

†, Values are least-square mean ± SE; #, Values are mean ± SD