Er,Cr:YSGG 2780 nm Laser Treatment of Lip Melanin Hyperpigmentation

Table 2

Statistical analysis using the one-sample chi-square test (X²) and one-sample binomial test to determine the significant difference between our null hypothesis to the actual observed data using Er,Cr:YSGG laser.

	Adverse effect	Wound healing after 14 days	Pain a using VAS index	Color improvement	Satisfaction after 3 months	Relapse after 18 months
X^2	145.078		45.941	1.875	0.398	9.326
Test statistics	208.843	2.000	45.941	7.547	3.277	19.280
Df	3	1	5	4	4	3
value	0.001	0.239	0.001	0.110	0.513	0.001

The distribution of the categories was reported with the specified probabilities according to the null hypothesis. One-sample binomial test was performed.