Table 5.

Mean comparisons of symptoms severity.

W	N	Mean	Std. Deviation	Std. Error	95% C.I.
					Lower Bound	Upper Bound
Absent	54	34.79	17.85	2.42	29.92	39.66
Mild	94	43.57	16.43	1.69	40.20	46.94
Moderate	144	47.82	13.15	1.09	45.66	49.99
Severe	41	55.73	14.13	2.20	51.26	60.19

Legend: the significance level is 0.050. Significance values have been adjusted by the Bonferroni correction for multiple tests.