Table 4.

Scores from the PRTEE-90 questionnaires in the three groups.

Group	Minimum score	Maximum score	Median	Mean	Standard error
A	1.5	80.0	9.5	15.5	3.9
B	0.0	85.0	12.8	21.8	5.5
C	0.5	91.5	6.5	13.0	4.7