Table 1. The results of descriptive analysis .

Group	Mean	95% confidence interval for mean	Median	Std. deviation	Minimum	Maximum
ZO	2.65	2.53‒2.77	2.64	0.22	1.75	3.25
OO	2.70	2.56‒2.84	2.71	0.27	2.09	3.37
OZ	2.18	1.97‒2.39	2.18	0.55	0.71	3.25
ZZ	3.07	2.91‒3.22	3.14	0.41	>2.44	3.71