Table 2: Results of nonadjusted multilevel analysis model of poisson log-linear regression for prevalence of periodontal condition (calculus and/or bleeding). Goiania, Brazil, 2010.

Regression coefficientStandard errorPrevalence ratioConfidence interval
95%

Contextual variables
 District I1.000
 District II0.31400.08401.3691.1611.6140.000*
 District III0.41800.28501.5190.8692.6550.143
 Private school1.000
 Public school0.43200.15401.5401.1392.0830.004*
 School toothbrushing program
  Yes1.000
  No0.12600.17801.1340.8001.6080.477
Individual variables
 Female1.000
 Male0.26600.14901.3050.9741.7470.074
 White1.000
 Black−0.02600.35500.9740.4861.9540.943
 Brown0.51800.25601.6791.0162.7730.043*
 Mother’s schooling (years)
  More than 11 1.000
  8 to 11 0.13700.23401.1470.7251.8140.558
  Less than 8 0.39000.37701.4770.7053.0920.301

* .