. 2022 Dec 8;13:1007697. doi: 10.3389/fpsyg.2022.1007697

Table 2.

Results of the null models.

Model equations	Fixed effects	Random effects		−2*log likelihood
Model equations	γ₀₀ (ES)	σ² (SD)	τ₀₀ (SD)	−2*log likelihood
Reduced accomplishment = β₀ + r	2.40*** (0.07)	0.49 (0.70)	0.02 (0.15)	301.2
Physical and emotional exhaustion = β₀ + r	2.95*** (0.11)	0.87 (0.93)	0.08 (0.28)	384.3
Sport devaluation = β₀ + r	1.71*** (0.08)	0.57 (0.76)	0.03 (0.18)	323.7
β_0j = γ₀₀ + U_0J

*p < 0.05; **p < 0.01; ***p < 0.001. SE, standard errors; SD, standard deviations; β_0j is the average level of burnout symptoms for individuals; γ₀₀ = is the group mean of burnout symptoms; σ² = var. (r_ij) variance in level-1 residual (i.e., variance in r_ij); τ₀₀ = var. (U_0j) variance in level-2 residual (i.e., variance in U_0j); ***p < 0.001.