Duration of

admission to the

hospital (days)

All

patients

Group I

(n = 20)

Group II

(n = 20)

Group III

(n = 20)

F/χ²#

P value

Mean ± SD

8.76 ± 1.84

3.61 ± 0.76

7.21 ± 1.51a

11.33 ± 2.38ab

Range

2 - 15

2 - 5

4 - 10

7 - 15

13.819

<0.001