Table 3.

Periodontal situation of all dental implants between two groups at each time point. N1: nonsmoking patient NO.1; N2: nonsmoking patient NO.2; N3: nonsmoking patient NO.3; N: the mean value of nonsmoking patient; S1: smoking patient NO.1; S2: smoking patient NO.2; S3: smoking patient NO.3; S: the mean value of smoking patient; ns: nonsense; P value was calculated from two-sided t-test.

Time (months)	Item	N1	N2	N3	N (mean±SD)	S1	S2	S3	S (mean±SD)	P
6	mSBI	0	0.25	0.75	0.33±0.220	0.75	0.50	0	0.42±0.220	0.6675 ns
	mPLI	0.25	0.25	1.00	0.50±0.250	0.50	0.25	0.25	0.33±0.083	0.3349 ns
	PD (mm)	1.25	1.50	1.75	1.50±0.144	2.25	1.75	1.25	1.75±0.289	0.2508 ns
12	mSBI	0.50	1.00	1.50	1.00±0.289	1.25	1.75	1.50	1.83±0.220	0.0550 ns
	mPLI	1.00	1.50	1.75	1.25±0.250	2.50	1.50	1.75	2.00±0.144	0.0808 ns
	PD (mm)	1.75	2.50	2.75	2.33±0.300	3.50	3.25	2.50	3.08±0.300	0.0378 (∗)