Table 2: Scheme of calculations and distribution of population (cases and controls) as per the Russell Index score.

Russell’s Index Score

Cases

Control

Stages -0

Clinically normal periodontal tissues

(0-0.2)

0

0

Stage -1

Simple gingivitis

(0.3-0.9)

0

11(10%)

Stage-2

Beginning Destructive

(1-1.9)

3(10%)

19 (17.2%)

Stage -3

Established destructive periodontal disease

(2-4.9)

17(56%)

68(61.8%)

Stage-4

Terminal Periodontal Disease

(5-8)

10(33.3%)

12(10.9%)