. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: J Autism Dev Disord. 2013 Nov;43(11):2677–2685. doi: 10.1007/s10803-013-1822-y

Table 1.

Characteristics of autistic and control samples

Characteristic

ASD
(N = 50)
(M ± SD)

Control
(N = 53)
(M ± SD)

Statistic

Effect size

Sex (% boys)

x_{Yates}^{2} (1) = 4.23

.04^*

φ = .22

Age (years)

10.26 ± 3.83

10.74 ± 4.03

t(101) = .61

.54

d = .12

BMI

16.81 ± 2.38

16.51 ± 1.86

t(101) = 73

.47

d = .14

Creatinine (ng ml⁻¹)

1.23 ± 0.10

1.13 ± 0.09

t(101) = 74

.46

d = .15

p < .05, two-tailed test