Table 3 Results of multivariate regressions predicting mental workload

Age (years)

 ≤ 30

1.699

0.981

2.996

0.043

5.466 (0.799–37.406)

2.849

1.164

5.987

0.014

17.264 (1.763–169.078)

 31–40

1.023

0.776

1.738

0.187

2.782 (0.608–12.731)

1.966

0.945

4.331

0.037

7.141 (1.121–45.484)

Marital status

 Unmarried

2.804

1.652

2.883

0.090

16.518 (0.649–42.601)

0.692

1.572

0.194

0.046

1.998 (0.092–43.493)

 Married

2.538

1.687

2.343

0.126

13.236 (0.485–36.377)

1.781

1.592

1.251

0.263

5.935 (0.262–134.538)

Education level

 Vocational

−1.522

1.483

1.053

0.305

0.218 (0.012–3.995)

−2.747

1.652

2.765

0.096

0.064 (0.003–1.634)

 Undergraduate

−0.898

1.388

0.419

0.517

0.407 (0.027–6.180)

−1.099

1.439

0.583

0.455

0.333 (0.020–5.592)

Monthly income (RMB)

 ≤ 6000

1.520

0.788

3.725

0.050

2.219 (0.047–1.024)

1.818

0.887

14.203

0.040

9.162 (0.029–0.923)

 6001–8000

0.181

0.631

0.082

0.774

1.199 (0.348–4.128)

−0.125

0.717

0.030

0.862

0.883 (0.217–3.598)

 8001–10000

1.076

0.778

1.915

0.166

2.933 (0.639–13.462)

1.193

0.822

2.105

0.147

3.296 (0.658–18.507)

Monthly night shift frequency

 No

−0.489

0.602

0.659

0.417

0.613 (0.188–1.997)

−0.858

0.737

1.353

0.245

0.424 (0.100–1.799)

 1–2 times

0.794

0.928

0.732

0.392

2.212 (0.359–13.640)

0.420

1.076

0.152

0.696

1.522 (0.185–12.545)

 3–5 times

0.700

0.761

0.846

0.358

2.014 (0.453–8.957)

−0.634

0.891

0.507

0.476

0.530 (0.093–3.038)

Support style

 Low

0.306

1.434

0.045

0.831

1.358 (0.082–22.578)

3.129

1.370

5.219

0.022

22.853 (1.560–334.808)

 Moderate

0.870

0.519

2.815

0.093

2.388 (0.864–6.599)

0.501

0.574

0.763

0.382

1.651 (0.536–5.084)

Coping style

 Positive coping

−0.743

0.486

2.337

0.126

0.476 (0.183–1.233)

−1.890

0.586

10.395

0.001

0.151 (0.048–0.477)

Personality traits

 Introverted

−1.077

0.641

2.829

0.093

0.341 (0.097–1.195)

1.400

0.717

3.816

0.051

4.056 (0.995–16.531)

 Extroverted

−2.557

0.565

20.512

<0.001

0.078 (0.026–0.234)

−1.860

0.701

7.029

0.008

0.156 (0.039–0.616)