Table 3 Changes in prevalence ratios (PRs) (95% CI) of untreated dental caries and sealant by income level

 I (lowest)

2.29 (1.51, 3.50)^***

2.11 (1.38, 3.23)^***

1.12 (0.64, 1.96)^NS

1.10(0.62, 1.93)^NS

1.47 (1.24, 1.74)^***

1.44 (1.22, 1.71)^***

1.77 (1.37, 2.32)^***

1.67 (1.28, 2.18)^***

 II

2.18 (1.43, 3.34)^***

2.14 (1.40, 3.28)^***

0.91 (0.51, 1.63)^NS

0.91 (0.51, 1.63)^NS

1.12 (0.93, 1.35)^NS

1.11 (0.92, 1.33)^NS

1.19 (0.88, 1.59)^NS

1.15 (0.85, 1.54)^NS

 III

1.44 (0.91, 2.27)^NS

1.44 (0.91, 2.27)^NS

0.66 (0.35, 1.25)^NS

0.67 (0.36, 1.27)^NS

0.96 (0.79, 1.17)^NS

0.96 (0.79, 1.17)^NS

1.17 (0.87, 1.56)^NS

1.16 (0.87, 1.55)^NS

 IV (highest)

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

 I (lowest)

0.70 (0.59, 0.85)^***

0.73 (0.61, 0.88)^***

0.90 (0.76, 1.06)^NS

0.92 (0.78, 1.09)^NS

0.54 (0.45, 0.66)^***

0.57 (0.47, 0.70)^***

0.70 (0.58, 0.85)^***

0.70 (0.58, 0.86)^***

 II

0.88 (0.74, 1.03)^NS

0.89 (0.75, 1.04)^NS

0.89 (0.75, 1.04)^NS

0.90 (0.76, 1.06)^NS

0.68 (0.57, 0.82)^***

0.71 (0.59, 0.84)^***

0.86 (0.73, 1.03)^NS

0.87 (0.73, 1.03)^NS

 III

0.89 (0.76, 1.05)^NS

0.90 (0.76, 1.05)^NS

1.01 (0.86, 1.18)^NS

1.01 (0.87, 1.18)^NS

0.85 (0.72, 1.00)^*

0.85 (0.73, 1.00)^NS

0.86 (0.73, 1.02)^NS

0.86 (0.73, 1.01)^NS

 IV (highest)

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00