Table: 2.

RF analysis of baseline and final observation of Progressive and Non–Progressive Surfaces

	First or baseline observation			Final observation or last before progression
	Progressed to cavitation (N = 224)	Did not progress (N = 486)		Progressed to cavitation (N = 224)	Did not Progress (N = 486)
RF Parameter	Mean (SE)	Mean (SE)	p-value	Mean (SE)	Mean (SE)	p-value
SPS™	0.045 (0.021)	0.019 (0.011)	0.0522	0.067 (0.031)	0.029 (0.009)	0.8458
Area ΔR30	0.069 (0.035)	0.039 (0.019)	0.3948	0.142 (0.086)	0.044 (0.012)	0.4164
Area ΔR70	0.016 (0.010)	0.009 (0.006)	0.0191*	0.022 (0.017)	0.006 (0.002)	0.4774
Area ΔR120	0.000 (0.000)	0.000 (0.000)		0.003 (0.003)	0.000 (0.000)	0.1905
ΔR0	1341 (87)	752 (48)	<.0001*	1449 (96)	867 (57)	<.0001*
ΔR10	43.00 (5.06)	26.87 (3.14)	0.0009*	51.17 (6.27)	32.00 (3.49)	<.0001*
ΔR20	5.96 (1.45)	2.56 (0.48)	0.0029*	9.55 (2.70)	3.72 (0.70)	0.3863
ΔR30	2.37 (0.83)	0.84 (0.28)	0.3770	4.43 (1.96)	1.46 (0.44)	0.3603
ΔR40	1.38 (0.58)	0.49 (0.25)	0.2837	2.76 (1.63)	1.01 (0.37)	0.2869
ΔR50	0.95 (0.44)	0.34 (0.20)	0.0538	2.04 (1.35)	0.62 (0.27)	0.4398
ΔR60	0.64 (0.29)	0.23 (0.13)	0.0167*	1.27 (0.83)	0.37 (0.18)	0.2233
ΔR70	0.33 (0.16)	0.12 (0.07)	0.0191*	0.71 (0.43)	0.21 (0.12)	0.4749
ΔR80	0.17 (0.09)	0.04 (0.03)	0.0511	0.42 (0.25)	0.13 (0.10)	0.7095
ΔR90	0.07 (0.05)	0.02 (0.01)	0.1440	0.33 (0.23)	0.09 (0.08)	0.3285
ΔR100	0.02 (0.01)	0.00 (0.00)	0.0373*	0.28 (0.20)	0.07 (0.07)	0.4253
ΔR110	0.01 (0.01)	0.00 (0.00)	0.1416	0.22 (0.17)	0.06 (0.06)	0.1905
ΔR120	0.00 (0.00)	0.00 (0.00)		0.18 (0.15)	0.04 (0.04)	0.1905
ΔRMax	44.08 (1.43)	35.85 (0.75)	<.0001*	47.71 (2.14)	40.51 (1.05)	0.0002*
Total	4955 (285)	3038 (166)	<.0001*	5113 (287)	3204 (169)	<.0001*

^*Statistically significant at the level of p<0.05; SPS – Simple Plaque Score; RF – Red Fluorescence; SE– Standard Error