NCs/D

Severity of bone loss

Chi-square

Mild N (%)

Moderate N (%)

Severe N (%)

χ²

p-value

cigarettes Smokers

<10 cig./Day

30(71.5%)

39 (66.1%)

39 (81.3%)

6.305

0.178

>10 cig./Day

12 (28.6%)

20 (33.9%)

9 (18.8%)