Table 3.

Papillary grading scores

Patient	Papillaea	Plugging	Pitting	LoC	RP	% Plugging	% RP
Brushite patients
1	2	1.5	0	0.5	1	2.39	2.70
2	9	0.89	0.78	0.56	0.44	0.97	3.26
3	15	0.93	0.47	1.47	0.4	0.71	0.64
4	All papillae scarred with no recognizable features
5	6	2	0.67	0.67	0	3.24	0.04
6	20	0.7	0.15	0.4	0.45	0.02	2.40
7	7	2	1.71	0.57	0.14	3.57	0.50
8	6	1	0.17	0.17	0.5	1.52	0.50
9	Video too dark to discern details for grading
Mean ± SD	9.3 ± 6.1	1.3 ± 0.5	0.6 ± 0.6	0.6 ± 0.4	0.4 ± 0.3	1.8 ± 1.3	1.4 ± 1.3
Calcium oxalate patients
10	6	0	0	0	1.5	0	4.51
11	4	0.25	0.5	0.25	1.25	0.06	1.47
12	8	0	0.375	0	0.625	0	4.39
13	7	0.14	0	0.29	0.29	0.05	0.45
14	5	1.2	0	0	0.4	0.79	1.29
15	9	0.78	0.33	0	1.11	0	2.68
16	7	0.43	0.43	0.71	0.86	0.15	2.17
17	7	1.71	0.43	0.14	0.86	3.20	1.77
18	5	0.2	0.4	0.8	1.4	0.052	3.34
19	4	1.25	0.25	0	0	0.47	0.15
20	9	0.11	0	0.33	1.33	0	6.56
MEAN ± SD	6.5 ± 1.8	0.6 ± 0.6	0.3 ± 0.2	0.2 ± 0.3	0.9 ± 0.5	0.4 ± 1.0	2.6 ± 1.9
P value	0.277	0.017	0.207	0.052	0.030	0.044	0.141

LoC, loss of papillary contour; RP, Randall's plaque.

Plugging, Pitting, LoC (loss of papillary contour), and RP (Randall’s plaque) are mean scores for papillae graded.¹⁵

% Plugging and % RP are obtained by measuring surface areas of plugging (yellow plaque) or RP on still frames from each papilla.⁵⁵

P values are Student's t tests assuming unequal variances, comparing brushite and CaOx.

Bold font indicates P < 0.05.

^aNumber of papillae from each patient that were able to be graded.