BMC Oral Health

Table 4 The results of significance tests of the observed patients-centered variables on visual analog scales at 1 and 7 days following the onset of treatment (n = 16 in each group)^a

From: Evaluation of the levels of pain and discomfort of piezocision-assisted flapless corticotomy when treating severely crowded lower anterior teeth: a single-center, randomized controlled clinical trial

Variable	One day						One week
	Mean difference	SD	95% CI for difference		P-value	Significance	Mean difference	SD	95% CI for difference		P-value	Significance
	Mean difference	SD	Min	Max	P-value	Significance	Mean difference	SD	Min	Max	P-value	Significance
Pain	10.29	14.3	0.26	20.33	0.082	NS	5.29	5.63	1.36	9.23	0.093	NS
Discomfort	5.29	16.8	−6.50	17.09	0.367	NS	4.12	6.35	−0.33	8.56	0.068	NS
Swelling	12.35	13.4	3.03	21.68	0.011	*	0.882	2.84	−1.10	2.869	0.372	NS
Mastication	13.24	18.6	0.21	26.26	0.062	NS	4.71	8.52	−1.25	10.66	0.117	NS
Swallowing	7.06	6.3	2.65	11.47	0.446	NS	–	–	–	–	–	–
Limitation	10.59	10.7	3.08	18.09	0.359	NS	1.47	3.38	−0.90	3.84	0.215	NS

^aTwo sample t test; * significant at P < 0.05; NS: Non-significant

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