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Table 3 Univariate and multivariate Poisson regression model for independent variables and for impact on quality of life (n = 1050)

From: Impact of primary dentition malocclusion on the oral health-related quality of life in preschoolers

Variable Impact on quality of life Bivariate Multivariate
Absent Present Unadjusted prevalence ratio Adjusted prevalence ratio
n (%) n (%) P (95% CI) P (95% CI)
Gender
Female 352 (68.9) 159 (31.1)   1.00   
Male 386 (71.6) 153 (28.4) 0.542 0.937 (0.762–1.154)
Age
2–3 years 317 (76.2) 99 (23.8)   1.00   
4–5 years 421 (66.4) 213 (33.6) 0.001 1.487 (1.187–1.863)  < 0.001 1.495 (1.193–1.873)
Malocclusion
No 463 (69.6) 202 (30.4)   1.00   
Yes 275 (71.4) 110 (28.6) 0.473 0.923 (0.742–1.148)
Anterior open bite
No 719 (70.8) 296 (29.2)   1.00   
Yes 19 (54.3) 16 (45.7) 0.132 1.454 (0.893–2.367) 0.096 1.514 (0.929–2.466)
Increased overjet
No 589 (69.9) 254 (30.1)   1.00   
Yes 149 (72.0) 58 (28.0) 0.490 0.910 (0.695–1.190)
Posterior crossbite
No 688 (69.9) 296 (30.1)   1.00   
Yes 50 (75.8) 16 (24.2) 0.461 0.841 (0.530–1.334)