Table 3 Association between cognitive impairment and QOL (outcome)—adjusted for age, gender, education level

1.57 (− 2.56; 5.70)

0.448

− 0.73 (− 5.96;4.51)

0.781

− 2.69 (− 8.71;3.32)

0.371

0.09 (− 5.00;5.18)

0.971

1.34 (− 1.30; 3.99)

0.311

1.39 (− 1.95;4.74)

0.404

− 0.69 (− 4.59;3.21)

0.724

0.92 (− 2.34;4.18)

0.572

0.92 (− 2.17; 4.01)

0.550

− 0.27 (− 4.17;3.64)

0.891

− 0.86 (− 5.38;3.65)

0.702

2.07 (− 1.67;5.81)

0.271

0.31 (− 3.05;3.67)

0.854

0.38 (− 3.85;4.62)

0.857

− 1.78 (− 6.65;3.10)

0.467

0.25 (− 3.86;4.37)

0.902

2.31 (− 0.04;4.67)

0.054

1.80 (− 1.25;4.85)

0.240

0.11 (− 3.49;3.71)

0.950

2.72 (− 0.17;5.62)

0.065

1.23 (− 1.10;3.57)

0.293

3.16 (0.34;5.97)

0.029

1.49 (− 1.93;4.91)

0.385

2.45 (− 0.34;5.24)

0.084

0.36 (− 2.35;3.06)

0.791

1.23 (− 2.16;4.62)

0.468

1.65 (− 2.26;5.58)

0.399

2.23 (− 1.01;5.47)

0.223