Table 1.

Inter group comparison of mean values of study parameters between two groups

Variables	Group	n	Mean	SD	Mean rank	Z-score	P
PD	Full term	63	3.46	0.59	53.88	−4.213	<0.001*
	Preterm	72	4.13	0.98	80.35
CAL	Full term	63	0.06	0.35	32.63	−10.424	<0.001*
	Preterm	72	3.06	1.37	98.94
P. gingivalis in blood	Full term	63	0.86	1.84	32.00	−10.224	<0.001*
	Preterm	72	59.82	36.95	99.50
P. gingivalis in plaque	Full term	63	42.40	24.80	38.42	−8.227	<0.001*
	Preterm	72	124.10	63.14	93.88

*P<0.05-statistically significant. Z-score – Standard score; SD – Standard deviation; PD – Pocket depth; CAL – Clinical attachment level, P. gingivalis – Porphyromonas gingivalis, n – number