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Table 4 Multinomial logistic regression of the NHS-2006 (n = 37,327, p = 0.000), NHS-2011/2012 (n = 38,727, p = 0.000) and NHS-2017 (n = 39,069, p = 0.000) for dental tooth extraction

From: Self-reported prevalence of periodontal disease among the Spanish population and immigrants: 2006, 2011/12 and 2017: a population-based study

Predictors

NHS-2006

NHS-2011/2012

NHS-2017

OR

95% CI

p value

OR

95% CI

p value

OR

95% CI

p value

Nationality

Spanish

1.00

1.00

1.00

Immigrant

1.50

1.26–1.79

0.000

0.94

0.78–1.12

0.473

1.14

0.95–1.37

0.169

Age

16–24 years

1.00

1.00

1.00

25–64 years

6.35

5.89–6.84

0.000

6.20

5.75–6.69

0.000

7.12

6.60–7.68

0.000

65 or over

16.42

14.83–18.19

0.000

14.70

13.33–16.20

0.000

23.25

20.98–25.76

0.000

Sex

Men

1.00

1.00

1.00

Women

1.38

1.31–1.46

0.000

1.09

1.04–1.15

0.001

1.06

1.00–1.12

0.038

Interaction: sex * nationality

Man * Spanish

1.00

1.00

1.00

Woman * Immigrant

0.69

0.60–0.80

0.000

0.99

0.87–1.12

0.834

1.04

0.91–1.19

0.529

Interaction: age * nationality

16–24 years * Spanish

1.00

1.00

1.00

25–64 years * Immigrant

0.45

0.38–0.54

0.000

0.64

0.54–0.77

0.000

0.69

0.57–0.83

0.000

65 or over * Immigrant

0.32

0.21–0.48

0.000

0.66

0.47–0.93

0.017

0.49

0.35–0.70

0.000