Table 2: Comparison of mean OHI-S score, Russell’s Periodontal Index and gingival bleeding score between study and control group by age.

AgeNMean OHI-S scoreMean Russell’s IndexMean bleeding on probing

<20 yrsControl70.9141.48616.29
Substance abusers91.7892.25613.44
20–29 yrsControl602.0102.04321.68
Substance abusers542.3062.83114.20
30–39 yrsControl912.4312.44323.60
Substance abusers862.7523.4798.07
40–49 yrsControl582.7572.99323.62
Substance abusers712.9284.0078.89
50–59 yrsControl243.0633.45022.54
Substance abusers233.1135.2708.00
≥60 yrsControl103.2203.58020.10
Substance abusers72.7436.0863.71