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Table 3 Cox proportional hazards regressions estimating silver diamine fluoride failure among advantage dental patients 64 and under

From: Survival of silver diamine fluoride among patients treated in community dental clinics: a naturalistic study

  Haz. Ratio 95% C.I Robust clustered S.E
Type of application (reference: SDF alone)
 SDF + sedative filling survival % 2.48*** 2–3.06 0.27
 SDF + restoration survival % 0.60 0.33–1.08 0.18
# of SDF applications (reference: one)
 2 0.93 0.78–1.11 0.08
 3 0.98 0.77–1.24 0.12
Caries risk (reference: low)
 No assessment 1.36 0.95–1.93 0.24
 Moderate 1.34 0.92–1.94 0.25
 High 1.42*** 1.03–1.97 0.24
Age (reference: 6–9)
 1–5 1.33** 1.07–1.65 0.15
 10–14 0.77 0.57–1.02 0.11
 15–20 0.94 0.62–1.43 0.20
 21–30 1.37 0.93–2.03 0.27
 31–40 1.29 0.82–2.05 0.30
 41–50 1.66* 1.09–2.55 0.36
 51–64 1.79*** 1.23–2.62 0.35
Tooth type—primary teeth (reference: lower molar)
 Lower incisor 0.66 0.23–1.91 0.36
 Lower cuspid 0.40* 0.18–0.89 0.16
 Upper incisor 0.61** 0.43–0.87 0.11
 Upper cuspid 0.51** 0.33–0.78 0.11
 Upper molar 0.86* 0.75–0.98 0.06
Tooth type—permanent teeth (reference: lower molar)
 Lower incisor 1.22 0.8–1.86 0.26
 Lower cuspid 1.17 0.72–1.88 0.28
 Lower bicuspid 0.77* 0.6–0.98 0.10
 Upper incisor 2.65*** 1.89–3.72 0.46
 Upper cuspid 1.35 0.89–2.04 0.28
 Upper bicuspid 1.17 0.9–1.52 0.16
 Upper molar 0.86 0.7–1.06 0.09
Number of teeth 7787   
Number of patients 1957   
Likelihood ratio chi-square 154.48*** 22 df  
  1. *p < .05; **p < .01; ***p < .001
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