MPTA	Groups				Total
	Group A		Group B		Total
	No.	%	No.	%	No.	%
Normal (90 ± 3)	42	60.9	21	52.5	63	57.8
Abnormal	27	39.1	19	47.5	46	42.4
Total	69	63.3	40	36.7	109	100
P value	0.394
Χ²	0.727
Significance	NS