Table 2.
Regression coefficients and model fit statistics for T1 Beck-rated anxiety and depression symptom severity, regressed onto alexithymia scores, controlling for demographic factors and core autism traits in the: (a) whole sample; (b) ASD group
| (a) All | (b) ASD | |||||
|---|---|---|---|---|---|---|
| Beck's Anxiety (T1) | Beck's Depression (T1) | Beck's Anxiety (T1) | Beck's Depression (T1) | |||
| β (95% CI) | β (95% CI) | β (95% CI) | β (95% CI) | |||
| Model 1 | Demographic | Age | −0.08 (−0.22 to 0.04) | −0.15 (−0.29 to −0.03)* | −0.05 (−0.23 to 0.11) | −0.15 (−0.34 to 0.01) |
| IQ | −0.10 (−0.22 to 0.01) | −0.02 (−0.14 to 0.10) | −0.18 (−0.35 to −0.04)* | −0.07 (−0.24 to 0.09) | ||
| Sex | −0.12 (−0.26 to −0.01)* | −0.13 (−0.27 to −0.02)* | −0.08 (−0.28 to 0.08) | −0.11 (−0.31 to 0.05) | ||
| Autism traits | SRS-2 | 0.45 (0.27–0.70)*** | 0.53 (0.35–0.78)*** | 0.39 (0.19–0.71)*** | 0.38 (0.16–0.71)** | |
| RBS-R | 0.03 (−0.11 to 0.18) | −0.09 (−0.24 to 0.05) | 0.06 (−0.12 to 0.25) | −0.10 (−0.30 to 0.08) | ||
| Alexithymia | Total | 0.21 (0.04–0.41)* | 0.20 (0.02–0.39)* | 0.18 (−0.04 to 0.44) | 0.22 (−0.01 to 0.49) | |
| Model fit (R2adj) | F(6,191) = 23.58, p < 0.001***, ηp2 = 0.64 (40.8%) | F(6,189) = 21.34, p < 0.001***, ηp2 = 0.63 (38.5%) | F(6,130) = 12.64, p < 0.001***, ηp2 = 0.61 (33.9%) | F(6,128) = 9.58, p < 0.001, ηp2 = 0.59 (27.8%) | ||
| Model 2 | Demographic | Age | −0.15 (−0.28 to −0.05)** | −0.21 (-0.35 to −0.11)*** | −0.13 (−0.30 to 0.01) | −0.22 (−0.41 to −0.08)** |
| IQ | −0.09 (−0.19 to 0.01) | −0.01 (−0.12 to 0.09) | −0.16 (−0.32 to −0.04)** | −0.06 (−0.21 to 0.08) | ||
| Sex | −0.05 (−0.16 to 0.06) | −0.07 (−0.19 to 0.04) | −0.02 (−0.18 to 0.14) | −0.04 (−0.22 to 0.11) | ||
| Autism traits | SRS-2 | 0.26 (0.11–0.44)*** | 0.37 (0.22–0.57)*** | 0.21 (0.05–0.44)** | 0.24 (0.06–0.49)** | |
| RBS-R | 0.04 (−0.09 to 0.17) | −0.08 (−0.23 to 0.04) | 0.05 (−0.10 to 0.22) | −0.10 (−0.29 to 0.05) | ||
| Alexithymia | Identify | 0.54 (0.41–0.69)*** | 0.48 (0.34–0.63)*** | 0.54 (0.41–0.77)*** | 0.52 (0.36–0.74)*** | |
| Model fit (R2adj) | F(6,191) = 39.32, p < 0.001***, ηp2 = 0.69 (53.9%) | F(6,189) = 31.96, p < 0.001***, ηp2 = 0.67 (48.8%) | F(6,130) = 22.70, p < 0.001***, ηp2 = 0.67 (48.9%) | F(6,128) = 16.49, p < 0.001***, ηp2 = 0.64 (41.0%) | ||
| Model 3 | Demographic | Age | −0.10 (−0.24 to 0.03) | −0.16 (−0.31 to −0.04)** | −0.06 (−0.24 to 0.11) | −0.15 (−0.35 to 0.01) |
| IQ | −0.12 (−0.24 to −0.01)* | −0.04 (−0.16 to 0.07) | −0.20 (−0.37 to −0.06)** | −0.10 (−0.27 to 0.06) | ||
| Sex | −0.12 (−0.27 to −0.01)* | −0.13 (−0.28 to −0.02)* | −0.08 (−0.28 to 0.08) | −0.11 (−0.31 to 0.06) | ||
| Autism traits | SRS-2 | 0.63 (0.48–0.88)*** | 0.71 (0.56–0.97)*** | 0.60 (0.44–0.93)*** | 0.60 (0.43–0.95)*** | |
| RBS-R | 0.02 (−0.12 to 0.17) | −0.10 (−0.26 to 0.04) | 0.05 (−0.13 to 0.24) | −0.10 (−0.30 to 0.07) | ||
| Alexithymia | Describe | −0.01 (−0.18 to 0.16) | −0.03 (−0.21 to 0.14) | −0.10 (−0.34 to 0.10) | −0.08 (−0.32 to 0.14) | |
| Model fit (R2adj) | F(6,191) = 21.98, p < 0.001***, ηp2 = 0.63 (39.0%) | F(6,189) = 20.07, p < 0.001***, ηp2 = 0.62 (37.0%) | F(6,130) = 12.21, p < 0.001***, ηp2 = 0.61 (33.1%) | F(6,128) = 8.86, p < 0.001***, ηp2 = 0.59 (26.0%) | ||
T1, timepoint 1; SRS-2, Social Responsiveness Scale-Second Edition (self-report); RBS-R, Repetitive Behaviour Scale-Revised; β (95% CI), regression coefficient with 95% confidence intervals.
*p < 0.05; **p < 0.01; ***p < 0.001 (significant after Bonferroni correction; p = 0.05/72).