CHARACTERISTICS CHARACTERISTICS Outcome: Caries risk at 3 years (dmfs) Outcome: Caries risk at 3 years (dmfs) Outcome: Caries risk at 3 years (dmfs) Outcome: Caries risk at 3 years (dmfs) Outcome: Caries risk at 3 years (dmfs) Outcome: Caries risk at 3 years (dmfs)
N Crude IRR (95%CI) P value N aIRRa (95%CI) P value
AD severity Moderate-to-Severe AD 7 2.22 (1.20-4.09) 0.01 6 2.30 (1.04-5.06) 0.03
Mild AD 38 0.91 (0.49-1.67) 0.77 33 0.89 (0.47-1.70) 0.74
Non-AD 611 1 542 1
Ethnicity Chinese 408 2.48 (1.69-3.64) <0.001 321 2.91 (1.82-4.66) <0.001
Malay 193 3.21 (1.93-5.33) <0.001 166 2.31 (1.37-3.89) 0.002
Indian 120 1 94 1
Gender Female 347 1.12 (0.79-1.60) 0.50 278 0.94 (0.69-1.28) 0.71
Male 374 1 303 1
Maternal educational levels Secondary & below 289 1.76 (1.26-2.47) 0.001 238 1.29 (0.90-1.86) 0.17
Pre-university & above 426 1 343 1
Monthly household income 0-1999 SGD 108 1.86 (1.21-2.84) 0.004 89 1.94 (1.15-3.26) 0.01
2000-3999 SGD 201 1.49 (0.98-2.25) 0.06 175 1.51 (0.95-2.40) 0.08
4000-5999 SGD 169 1.06 (0.73-1.55) 0.75 151 1.06 (0.68-1.64) 0.79
≥6000 SGD 194 1 166 1
Prenatal tobacco smoke exposure Yes 261 1.41 (0.97-2.06) 0.07 219 0.95 (0.67-1.35) 0.80
No 423 1 362 1