Table 2.

Main effects of hierarchical linear models

	Test
Overall severity
Chronological age	F(1,88.41) = 17.31, p < .001
Sex	F(1,64.60) = .00, p = .98
Chronological age*sex	F(1,104.92) = .404, p = .53
Mental age	F(1,102.26) = 1.59, p = .211
Receptive and expressive vocabulary	F(1,109.50) = .142, p = .71
Pragmatic language	F(1,114.85) = 3.81, p = .054
Severity of social affect
Chronological age	F(1,85.7) = 17.03, p < .001
Sex	F(1,64.21) = .07, p = .80
Chronological age*sex	F(1,101.32) = .43, p = .51
Mental age	F(1,98.02) = .49, p = .49
Receptive and expressive vocabulary	F(1,106.74) = .35, p = .56
Pragmatic language	F(1,115.88) = 3.45, p = .07
Severity of restricted and repetitive behavior
Chronological age	F(1,83.67) = 6.36, p = .014
Sex	F(1,66.56) = .019, p = .87
Chronological age*sex	F(1,96.37) = 1.65, p = .20
Mental age	F(1,92.45) = 4.78, p = .03
Receptive and expressive vocabulary	F(1,102.35) = .02, p = .89
Pragmatic language	F(1,115.17) = 3.06, p = .08

* represents the interaction between chronological age and sex