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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: J Dent. 2019 Dec 30;93:103269. doi: 10.1016/j.jdent.2019.103269

Table 3.

Tooth-level characteristics of subjects with a cracked tooth

ALL Increase in # cracks Increase in # symptoms Decrease in # of symptoms
(N = 1,850) (N = 106) (N = 194) (N = 421)
Tooth-level characteristic1 N1 Col%2 N Row %3 N Row %3 N Row %3
Molar 1,478 80% 85 6% 160 11% 365 25%
Premolar 372 20% 21 6% 34 9% 56 15%
adjusted OR4 OR = 1.02 OR = 1.09 OR = 1.84
adjusted p6 P = 0.9 P = 0.66 P < 0.001
2 or more external cracks 1,191 64% 78 7% 136 11% 300 25%
1 external crack 659 36% 28 4% 58 9% 121 18%
adjusted OR OR = 1.32 OR = 1.15 OR = 1.48
adjusted p P = 0.22 P = 0.36 P = 0.001
Wear facet through enamel 424 23% 83 6% 41 10% 115 27%
No wear facet through enamel 1,426 77% 23 5% 153 11% 306 21%
adjusted OR OR = 0.92 OR = 0.86 OR = 1.29
adjusted p P = 0.8 P = 0.47 P = 0.12
Exposed roots 442 24% 30 7% 50 11% 97 22%
No exposed roots 1,408 76% 76 5% 144 10% 324 23%
adjusted OR OR = 1.21 OR = 1.07 OR = 0.85
adjusted p P = 0.4 P = 0.67 P = 0.20
Caries present 51 3% 4 8% 11 22% 15 29%
No caries present 1,799 97% 102 6% 183 10% 406 23%
adjusted OR OR = 1.65 OR = 2.03 OR = 1.24
adjusted p P = 0.4 P = 0.19 P = 0.44
NCCL6 present 180 10% 13 7% 21 12% 38 21%
No NCCL present 1,670 90% 93 6% 173 10% 383 23%
adjusted OR OR = 1.26 OR = 1.14 OR = 0.86
adjusted p P = 0.5 P = 0.55 P = 0.43
1

Column Ns not summing to column total N above due to missing data.

2

Column percents not summing to 100 due to rounding.

3

Percent of column within level of tooth characteristic.

4

OR: Odds ratios adjusted for clustering of patients within practice.

5

P: P-value adjusted for clustering of patients within practice.

6

NCCL: Non-carious cervical lesion.