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Table 2 Comparison of clinical periodontal parameters and salivary cortisol levels between two groups

From: Association between schizophrenia and periodontal disease in relation to cortisol levels: an ELISA-based descriptive analysis

Variables Group-A Group-B Mean difference SD error difference t’ value p’ value
Min Max Mean SD Min Max Mean SD
GI 0.50 3.00 2.467 0.528 0.000 2.000 0.355 0.561 2.11 0.172 12.236 0.000
PI 0.50 3.00 2.402 0.526 0.000 2.000 0.475 0.678 1.927 0.192 10.039 0.000
PD (mm) 1.250 4.870 2.854 0.865 1.00 4.200 1.493 0.744 1.3610 0.2552 5.330 0.000
CAL (mm) 0.000 14.500 1.726 3.096 0.000 1.000 0.108 0.254 1.6189 0.6947 2.330 0.025
Cortisol levels 0.000 0.257 0.190 0.059 0.168 1.009 0.590 0.228 − 0.400 0.052 − 7.595 0.000