Table 4: Correlation between OHI-S score with Russell’s Index and Gingival Bleeding Index.

GroupCorrelation between OHI-S score verses
Russell’s IndexGingival Bleeding Index

ControlCorrelation coefficient0.7210.371
P value<0.001<0.001
N250250

Substance abusersCorrelation Coefficient0.479−0.200
P value<0.0010.001
N250250