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. 2019 Nov 1;19:1436. doi: 10.1186/s12889-019-7816-8

Table 4.

Estimates of the Fixed Effects Base Model for SF36 Physical Functioning Component

Variables SF36 Physical Functioning Component
Coef. (Standard Error) [95% Conf.
Coef.
Carer Status (Yes/No): Actively cares for a household member/non-resident due to long-term health condition, elderly − 0.199 (0.240) −0.669 0.271
Constant 83.913*** (.017) 83.880 83.946
sigma_u 21.537
sigma_e 13.109
rho 0.730 (fraction of variance due to u_i)

Notes. All the p-values have been replaced by stars and categorised as follows. ***: p < 0.01; **: p < 0.05; *: p < 0.1; However, confidence intervals use the usual 95% confidence level; sigma_u: Within-individuals variance; sigma_e: Residual variance; rho: Percentage of total variance due to within-individuals variation (or ICC, the intra-class correlation, measure of intra-individual correlation)