Table 2.

Associations between cognitive status and sarcopenia in adults aged over 50 years old

Outcome variable	Model 1: Depressed			Model 2: Depressed			Model 3: PSQI
	β	p	95% CI	β	p	95% CI	β	p	95% CI
PSQI	–	–	–	0.088	< 0.001	0.071 to 0.106	–	–	–
Cognitive score	0.251	< 0.001	0.211 to 0.29	0.242	< 0.001	0.203 to 0.281	0.101	< 0.001	0.047 to 0.154
Ethnic group: Han	− 0.236	< 0.001	− 0.353 to − 0.119	− 0.281	< 0.001	− 0.398 to − 0.165	0.509	< 0.001	0.349 to 0.669
Gender: Female	− 0.094	0.207	− 0.241 to 0.052	− 0.191	0.011	− 0.338 to − 0.044	1.094	< 0.001	0.893 to 1.295
Age	−0.002	0.568	−0.009 to 0.005	− 0.005	0.195	− 0.012 to 0.002	0.029	< 0.001	0.019 to 0.038
Educational: Elementary school	−0.066	0.369	−0.211 to 0.078	−0.066	0.367	−0.21 to 0.078	− 0.003	0.975	− 0.201 to 0.195
Educational: Middle school	−0.21	0.016	−0.381 to − 0.039	−0.193	0.026	−0.363 to − 0.023	−0.19	0.111	−0.424 to 0.044
Educational: High school and above	−0.563	< 0.001	−0.761 to − 0.364	−0.522	< 0.001	− 0.719 to − 0.324	−0.463	0.001	−0.735 to − 0.19
Occupation: Farmers	0.447	< 0.001	0.312 to 0.581	0.433	< 0.001	0.3 to 0.567	0.152	0.106	−0.032 to 0.336
Dancing, Yes	−0.207	0.004	−0.348 to − 0.066	−0.182	0.011	−0.322 to − 0.042	−0.289	0.003	−0.482 to − 0.096
Smoking: Yes	− 0.177	0.035	− 0.342 to − 0.013	−0.203	0.015	−0.367 to − 0.04	0.292	0.011	0.067 to 0.518
Drinking tea: Yes	−0.096	0.095	−0.208 to 0.017	−0.101	0.077	−0.213 to 0.011	0.059	0.456	−0.096 to 0.213
Anxiety: Yes	1.828	< 0.001	1.695 to 1.962	1.689	< 0.001	1.554 to 1.824	1.574	< 0.001	1.392 to 1.757
Deafness: Yes	0.561	0.084	−0.076 to 1.197	0.425	0.188	−0.208 to 1.057	1.535	0.001	0.664 to 2.406
CHD: Yes	0.09	0.526	−0.187 to 0.367	−0.043	0.762	−0.319 to 0.234	1.498	< 0.001	1.119 to 1.877
Osteoarthrosis, Yes	−0.074	0.405	−0.249 to 0.101	−0.177	0.047	−0.352 to − 0.003	1.167	< 0.001	0.928 to 1.406
Constant	2.309	< 0.001	1.802 to 2.817	2.06	< 0.001	1.554 to 2.566	2.826	< 0.001	2.132 to 3.519
Observations	6828			6828			6828
R2	0.1675			0.1796			0.1271
Adjusted R2	0.1656			0.1777			0.1251
Residual standard error	2.249 (df = 6812)			2.233 (df = 6811)			3.077 (df = 6812)
F Statistic (df; P value)	91.36 (df = (15, 6812);P value< 0.001)			93.22 (df = (16,6811);P value< 0.001)			66.1 (df = (15,6812); P value< 0.001)

Note. Model 1: multiple linear regression analysis between depressed and cognitive score, Model 2: multiple linear regression analysis between depressed and cognitive score adjusted by PSQI, Model 3: multiple linear regression analysis between PSQI and cognitive score

Adjusted by gender, age, and ethnic group, life styles (dancing, smoking and drinking tea), chronic diseases (deafness, CHD, osteoarthrosis) and anxiety