Table 2.

Intergroup comparison of relative attachment level at baseline, 3, 6, and 9 months

Groups	n	Mean	SD	SE	χ 2	P value of Kruskal–Wallis ANOVA
RAL baseline
1	13	10.38	0.870	0.241	0.749	0.687#
2	13	10.46	0.519	0.144
3	13	10.62	0.768	0.213
Total	39	10.49	0.721	0.115
RAL 3 months
1	13	9.00	0.816	0.226	12.303	0.002**
2	13	8.69	0.480	0.133
3	13	7.77	0.832	0.231
Total	39	8.49	0.885	0.142
RAL 6 months
1	13	8.77	0.725	0.201	18.721	0.000**
2	13	7.92	0.760	0.211
3	13	7.00	0.816	0.226
Total	39	7.90	1.046	0.168
RAL 9 months
1	13	8.77	0.725	0.201	27.352	0.000**
2	13	7.69	0.630	0.175
3	13	6.62	0.506	0.140
Total	39	7.69	1.080	0.173

Group 1: OFD + placebo; Group 2: OFD + ABG + PRF; Group 3: OFD + ABG + PRF + RSV. OFD: Open flap debridement; ABG: Autogenous bone graft; PRF: Platelet-rich fibrin; RSV: 1.2 mg rosuvastatin gel; n: Number of patients; RAL: Relative attachment level; SD: Standard deviation; SE: Standard error