Table 2.
Incidence density of decrease in self-esteem and increase in trait anxiety between Nov 01 and May 04. Comparison between extra curricular sports (ECS) practice and no extra curricular sports (NECS) practice (mean age 11 years in Nov 01).
ECS
NECS
Chi
2
values
Incidence density of decrease in self-esteem
Moderate: < mean – 1 SD
129.0
124.1
.24
Severe: < mean – 2 SD
25.1
16.2
1.60
Incidence density of increase in trait anxiety
Moderate: > mean + 1 SD
105.6
129.0
.25
Severe: > mean + 2 SD
16.3
18.3
.15
SD = standard deviation.