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Table 2 Poisson regression analyses of the association between non-carious cervical lesions and the independent variables

From: Prevalence of non-carious cervical lesions and orthodontic treatment: a retrospective study

Variable

PR (95% CI)

p value

Adjusted PR (95% CI)

p value

Age (reference: up to 20 years)

1

 

1

 

 21–35 years

1.13 (1.05–1.23)

0.002*

1.14 (1.05–1.25)

< 0.002*

 > 35 years

1.17 (1.08–1.25)

< 0.001*

1.19 (1.10–1.29)

< 0.001*

Gender (reference: women)

1

 

1

 

 Men

1.02 (0.94–1.10)

0.564

1.05 (0.97–1.14)

0.158

Angle classification (reference: Class I)

1

 

1

 

 Class II

1.05 (0.97–1.13)

0.213

1.00 (0.93–1.09)

0.815

 Class III

1.11 (1.00–1.23)

0.046*

1.09 (0.98–1.22)

0.095

Facial pattern (reference: mesofacial)

1

 

1

 

 Brachyfacial

1.04 (0.95–1.13)

0.308

1.04 (0.96–1.13)

0.251

 Dolichofacial

1.11 (0.98–1.25)

0.079

1.08 (0.95–1.22)

0.198

Number of activation sessions (reference: 6 to 18 sessions)

1

   

 19–36 sessions

1.03 (0.92–1.15)

0.558

1.07 (0.97–1.18)

0.161

 > 36 sessions

1.08 (0.95–1.23)

0.222

1.11 (0.97–1.28)

0.114

Compensatory treatment (reference: no)

1

 

1

 

 Yes

0.99 (0.92–1.08)

0.960

0.98 (0.91–1.06)

0.682

Retreatment (reference: no)

1

 

1

 

 Yes

1.07 (0.99–1.15)

0.057

1.03 (0.96–1.11)

0.320

  1. PR prevalence ratio, CI confidence interval
  2. *Significant difference (Poisson regression model, p < 0.05)