Table 2.

DD scores for active (unarrested) and inactive (arrested) dental caries lesions in an accuracy study of caries lesions in older adults.^a

	Active (unarrested) caries at baseline				Active (unarrested) caries at follow-up				Inactive (arrested) caries
Surface/DD machine	n	Mean DD ± SD	Median	Range	n	Mean DD ± SD	Median	Range	n	Mean DD ± SD	Median	Range
All surfaces	428	59.9 ± 26.7	56	20–99	57	46.4 ± 28.4	40	9–40	294	20.9 ± 16.1	17	0–17
DD machine
1	145	60.2 ± 26.7	57	23–99	9	75.0 ± 30.0	90	29–99	85	24.6 ± 16.8	19	4–67
2	170	65.9 ± 26.0	66	20–99	15	50.8 ± 27.5	50	10–99	129	23.7 ± 16.0	21	0–77
3	113	50.6 ± 25.2	46	20–99	33	36.5 ± 22.6	28	9–99	80	12.5 ± 25.3	8	0–67
Tooth surface
Distal or mesial	199	56.5 ± 26.4	52	20–99	24	35.9 ± 21.8	29	10–99	142	18.1 ± 15.9	13	0–77
Facial or lingual	216	60.0 ± 26.6	60	20–99	33	54.0 ± 30.4	46	9–99	152	23.5 ± 15.8	20	0–65
Surface area
Root	216	60.0 ± 26.8	56	20–99	27	47.7 ± 30.3	41	16–99	168	15.8 ± 14.2	11	0–77
Furcation and crown margin	212	59.8 ± 26.6	56	20–99	30	45.2 ± 27.0	40	9–99	126	27.7 ± 16.0	24	3–76
Tooth position
Posterior	271	60.8 ± 26.5	58	20–99	30	46.1 ± 26.8	40	9–99	183	24.5 ± 16.2	22	0–77
Anterior	157	58.4 ± 26.9	54	21–99	27	46.6 ± 30.5	38	10–99	111	15.0 ± 14.1	10	0–67

At follow-up, mean DD values were significantly different between active and inactive caries for all comparisons, p value <0.003. Mean DD values were not significantly different between active caries at baseline and follow-up for all comparisons (p value >0.05), except for DD machine 1 and distal or mesial tooth surfaces (p value < 0.01).

^aMean DD values were significantly different between active (baseline and follow-up combined) and inactive caries for all comparisons, p value < 0.0001.