Journal of Korean Academy of Oral Health

Table. 2. Table 2

Changes in clinical parameters pre- and post-scaling

Clinical parameters		Mean±SD	Mean rank	Sum of ranks	Z	P
PI	Pre	1.88±1.60	26.46	714.50	―3.326	.001^**
PI	Post	0.92±1.13	26.46	714.50	―3.326	.001^**
PD	Pre	3.27±0.53	9.09	145.50	―3.497	.000^***
PD	Post	2.90±0.70	9.09	145.50	―3.497	.000^***
mSBI	Pre	1.55±0.83	25.83	1240.00	―6.061	.000^***
mSBI	Post	0.12±0.43	25.83	1240.00	―6.061	.000^***
CI	Pre	2.33±0.93	25.50	1275.00	―6.272	.000^***
CI	Post	0.60±0.72	25.50	1275.00	―6.272	.000^***

**P<0.01, ***P<0.001, related-samples Wilcoxon signed ranks test.