Table 3.

Summary of the results of the studies that analyzed the effects of bruxism and GERD synergy on tooth wear.

Study	Variable 1	Variable 2	Univariate Analysis	Multivariable Analysis (1)	Multivariable Analysis (2)
Yuanyuan Li et al.	Bruxism	GERD	7.95 (5.08–12.46), p < 0.001	6.87 (4.34–10.88), p < 0.001
(July 2018)	Bruxism	GERD + Male	4.43 (2.46–7.99), p < 0.001	3.81 (2.09–6.95), p < 0.001	3.99 (2.17–7.32), p < 0.001
	Bruxism	GERD + Female	14.59 (7.02–30.33), p < 0.001	12.27 (5.81–25.91), p < 0.001
	Bruxism	Longer GERD duration (>2 years)	1.44 (1.06–1.97), p: 0.021	1.50 (1.10–2.05), p: 0.011
	GERD	Awake Bruxism	18.78 (7.91–44.60), p < 0.001	13.06 (5.32–32.05), p < 0.001
		Sleep Bruxism	7.61 (4.83–11.98), p < 0.001	6.71 (4.22–10.68), p < 0.001
		Awake + Sleep Bruxism	8.14 (3.93–16.87), p < 0.001	6.48 (3.05–13.77), p < 0.001
Yuanyuan Li et al.				OR (95% CI)—p-Value	OR (95% CI)—p-Value
(November 2018)	Bruxism	GERD	6.21 (3.36–11.46), p < 0.001	5.30 (2.62–10.70), p < 0.001	3.84 (1.86–7.95), p < 0.001
	Bruxism	GERD (duration ≤ 5 years)	4.15 (1.86–9.25), p < 0.001	3.38 (1.38–8.24), p: 0.008	2.49 (0.98–6.29), p: 0.054
	Bruxism	GERD (duration > 5 years)	9.49 (3.70–24.36), p < 0.001	8.73 (2.97–25.63), p < 0.001	6.27 (2.07–18.97) p: 0.001
	Bruxism + GERD ≥ 5 years	Severe Tooth Wear	5.11 (2.60–10.04), p < 0.001	4.70 (2.04–10.83), p < 0.001
	Bruxism + GERD ≤ 5 years	Palatal/Lingual Tooth Wear	8.59 (1.94–38.04), p: 0.005
	Bruxism + GERD > 5 years	Palatal/Lingual Tooth Wear	15.19 (4.57–50.51), p < 0.001
	Bruxism + GERD > 5 years	Occlusal/Incisal Tooth Wear	4.86 (2.48–9.52), p < 0.001
	Bruxism + GERD ≤ 5 years	Anterior Severe Tooth Wear	3.10 (1.14–8.45), p: 0.027
	Bruxism + GERD > 5 years	Anterior Severe Tooth Wear	3.16 (1.37–7.32), p: 0.007
		Posterior Severe Tooth Wear	3.92 (1.69–9.05), p: 0.001
		Upper Severe Tooth Wear	3.74 (1.63–8.58), p: 0.002
		Lower Severe Tooth Wear	3.71 (1.60–8.61), p: 0.002