Table 1.

Comparison of periodontal parameters between the groups

Parameter	With COPD	Without COPD	P
PPD*
Mean	4.07	3.50	<0.001
SD	1.03	0.98
Mean rank	83.96	46.52
CAL*
Mean	0.58	0.24	<0.001
SD	0.29	0.19
Mean rank	88.33	44.33
OHI*
Mean	5.24	3.60	<0.001
SD	1.12	1.04
Mean rank	89.95	43.53

*Significant at P<0.001; Mann–Whitney test. SD – Standard deviation; COPD – Chronic obstructive pulmonary disease; PPD – Probing Pocket Depth; CAL – Clinical Attachment Loss; OHI – Oral Hygiene Index