The average hospitals stays of the above two groups were 14.0 3.5 d and 19.0 6.8 d ( t = 2.85 , P < 0.01 ) , respectively , and the average hospitalization expenses were ( 1.5 0.5 ) thousand Yuan and ( 2.2 0.7 ) thousand Yuan ( t = 24.57 , P < 0.01 ) , respectively , both of the differences were statistically significant .