Table 2 Multilevel moderation analysis in the replication study (n = 83): sgACC volume moderates within-subject association of nonexercise activity and energetic arousal.

Multilevel moderation analysis in the replication study (n = 83): sgACC volume moderates within-subject association of nonexercise activity and energetic arousal.. Outcome: energetic arousal (range, 0 to 100); presented are the fixed effects. a.u., arbitrary units.

Predictorβ coefficientSET value (df)P value
Intercept22.57819.3971.16 (78.8)0.248
Moderation (cross-level interaction analysis)
  sgACC volume*Nonexercise activity (a.u.)−0.1480.046−3.23 (5532)0.001
Main predictors
  sgACC volume (a.u.)−8.66417.799−0.49 (74.9)0.628
  Nonexercise activity (milli-g)0.1850.0384.92 (5532)<0.001
Covariates on level 1 (within-subject)
  Time (hours)7.9020.43718.09 (5540)<0.001
  Time squared (hours2)−0.2790.014−19.43 (5540)<0.001
  Exercise activity/day (min)−0.0200.012−1.69 (5535)0.090
Covariates on level 2 (between-subject)
  Age (years)−0.5900.454−1.30 (75.2)0.197
  Gender: female0.1023.0220.03 (74.2)0.973
  BMI (kg/m2)0.3150.3780.83 (75.1)0.407
  Exercise/week (min)−0.0060.006−0.99 (76)0.327
  Neuroticism (0–4)−6.2191.586−3.92 (74.6)<0.001
Total intracranial volume (a.u.)0.0050.0150.32 (74.5)0.750