Table 3 Associations between root ICDAS caries lesions, root ICDAS active caries lesions and individual factors

Sex*

 Female

1 [Reference]

1 [Reference]

1 [Reference]

1 [Reference]

 Male

1.62 [0.90–2.90]

1.95 [1.05–3.61]

1.37 [0.76–2.46]

1.44 [0.80–2.60]

Age* (years)

  < 65

1 [Reference]

1 [Reference]

1 [Reference]

1 [Reference]

  ≥ 65

0.83 [0.31–2.23]

0.83 [0.31–2.22]

0.70 [0.29–2.14]

0.81 [0.31–2.11]

Caries risk classification

 Low

1 [Reference]

1 [Reference]

1 [Reference]

1 [Reference]

 High

0.72 [0.41–1.27]

0.81 [0.45–1.45]

0.73 [0.41–1.30]

0.82 [0.47–1.44]

Presence of thick plaque

 No

1 [Reference]

1 [Reference]

1 [Reference]

1 [Reference]

 Si

1.22 [0.69–2.15]

1.43 [0.77–2.64]

1.09 [0.61–1.95]

1.20 [0.66–2.1]

Partial denture wear**^△

 No

1 [Reference]

1 [Reference]

1 [Reference]

1 [Reference]

 Yes

1.31 [0.71–2.40]

1.29 [0.67–2.48]

1.21 [0.65–2.32]

1.26 [0.66–2.40]

Presence of coronal caries lesions

 No

1 [Reference]

1 [Reference]

NI

NI

 Yes

2.13 [1.20–3.78]

2.41 [1.33–4.39]

NI

NI

Presence of active coronal caries lesions

 No

NI

NI

1 [Reference]

1 [Reference]

 Yes

NI

NI

1.64 [0.92–2.91]

1.70 [0.95–3.04]

Number of teeth in the mouth

  ≤ 6

1 [Reference]

1 [Reference]

1 [Reference]

1 [Reference]

 7–14

1.47 [0.76–2.81]

0.82 [0.37–1.80]

1.57 [0.81–3.00]

1.04 [0.49–2.24]

  > 14

0.68 [0.36–1.29]

0.30 [0.13–0.70]

0.92 [0.48–1.78]

0.58 [0.26–1.28]

Exposed root surfaces

  ≤ 8

1 [Reference]

1 [Reference]

1 [Reference]

1 [Reference]

 9–21

3.83 [1.92–7.65]

4.04 [1.88–8.66]

2.95 [1.47–5.89]

2.82 [1.36–5.85]

  ≥ 22

2.65 [1.38–5.07]

3.51 [1.56–7.90]

2.32 [1.20–4.48]

2.39 [1.10–5.21]