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Table 2 Results of the linear models

From: Physical activity, body mass index and heart rate variability-based stress and recovery in 16 275 Finnish employees: a cross-sectional study

 

Men

Women

Parameter Estimate

95 % Cl Lower

Upper

P value

Variance explained (%)

Parameter Estimate

95 % Cl Lower

Upper

P value

Variance explained (%)

Stress (%), 24 h a

    

2.356h

    

1.476 h

 Intercept

52.3153

50.7730

53.8575

<0.001

 

50.0658

48.9790

51.1527

<0.001

 

  Age (18 years = 0)

−0.1263

−0.1600

−0.0926

<0.001

0.780i

−0.0869

−0.1151

−0.0587

<0.001

0.387 i

  BMI (18.5 kg/m2 = 0)

0.1541

0.0580

0.2502

0.002

0.144 i

0.0909

0.0264

0.1553

0.006

0.081 i

  Physical activity level (inactive = 0)

    

1.586 i

    

1.050 i

   Low physical activity class

0.3235

−0.6903

1.3372

0.53

 

−0.8892

−1.5471

−0.2313

0.008

 

   Medium physical activity class

−1.1405

−2.2144

−0.0667

0.04

 

−1.9539

−2.7608

−1.1470

<0.001

 

   High physical activity class

−3.9695

−5.0062

−2.9328

<0.001

 

−4.3772

−5.2620

−3.4923

<0.001

 

Stress (%), working hours b

    

4.152 h

    

1.721 h

 Intercept

807.3480

777.0476

837.6483

<0.001

 

677.8091

656.0738

699.5443

<0.001

 

  Age (18 years = 0)

−4.8729

−5.5355

−4.2103

<0.001

2.942 i

−2.66482

−3.22838

−2.10127

<0.001

0.905 i

  BMI (18.5 kg/m2 = 0)

−4.6640

−6.5515

−2.7766

<0.001

0.341 i

−4.54067

−5.82984

−3.25149

<0.001

0.504 i

  Physical activity level (inactive = 0)

    

1.590 i

    

0.584 i

   Low physical activity class

−5.5094

−25.4261

14.4073

0.59

 

−3.40975

−16.5664

9.746938

0.61

 

   Medium physical activity class

−24.7847

−45.8819

−3.6874

0.021

 

−17.9339

−34.0695

−1.79829

0.030

 

   High physical activity class

−85.2896

−105.6576

−64.9215

<0.001

 

−61.7878

−79.4833

−44.0923

<0.001

 

Stress index, 24 h c

    

27.113 h

    

27.448 h

 Intercept

1.2406

1.2403

1.2409

<0.001

 

1.2414

1.2412

1.2417

<0.001

 

  Age (18 years = 0)

0.0001

0.0001

0.0001

<0.001

21.992 i

0.0001

0.0001

0.0001

<0.001

19.655 i

  BMI (18.5 kg/m2 = 0)

0.0002

0.0001

0.0002

<0.001

3.819 i

0.0001

0.0001

0.0001

<0.001

3.031 i

  Physical activity level (inactive = 0)

    

0.115 i

    

0.145 i

   Low physical activity class

0.0002

0.0000

0.0004

0.024

 

−0.0001

−0.0003

0.0000

0.031

 

   Medium physical activity class

0.0000

−0.0002

0.0002

0.91

 

−0.0002

−0.0004

−0.0001

0.002

 

   High physical activity class

0.0001

−0.0001

0.0003

0.47

 

−0.0003

−0.0004

−0.0001

0.002

 

Stress balance, sleep e

    

3.669 h

    

3.244 h

 Intercept1

0.9975

0.9287

1.0663

<0.001

 

0.6166

0.5672

0.6661

<0.001

 

 Intercept2

−0.5292

−0.5503

−0.5082

<0.001

 

−0.5537

−0.5705

−0.5368

<0.001

 

  Age (18 years = 0)

−0.0066

−0.0081

−0.0052

<0.001

1.153 i

−0.0007

−0.0019

0.0006

0.31

0.006 i

  BMI (18.5 kg/m2 = 0)

−0.0273

−0.0315

−0.0231

<0.001

2.179 i

−0.0253

−0.0282

−0.0224

<0.001

3.080 i

  Physical activity level (inactive = 0)

    

0.445 i

    

0.233 i

   Low physical activity class

−0.0715

−0.1162

−0.0269

0.002

 

−0.0126

−0.0423

0.0172

0.41

 

   Medium physical activity class

−0.0799

−0.1272

−0.0326

<0.001

 

−0.0572

−0.0937

−0.0207

0.002

 

   High physical activity class

−0.1327

−0.1784

−0.0870

<0.001

 

−0.0822

−0.1222

−0.0421

<0.001

 

Recovery index, sleep f

    

9.685 h

    

3.297 h

 Intercept

592375.4298

573358.1497

611392.7100

<0.001

 

457913.8301

444648.7930

471178.8673

<0.001

 

  Age (18 years = 0)

−5092.7330

−5508.5947

−4676.8712

<0.001

7.753 i

−2100.7061

−2444.6430

−1756.7692

<0.001

1.501 i

  BMI (18.5 kg/m2 = 0)

−4825.0722

−6009.6783

−3640.4662

<0.001

0.921 i

−4038.5841

−4825.3668

−3251.8014

<0.001

1.065 i

  Physical activity level (inactive = 0)

    

0.154 i

    

0.026 i

   Low physical activity class

−19214.5686

−31714.7934

−6714.3437

0.003

 

1051.0555

−6978.4656

9080.5766

0.80

 

   Medium physical activity class

−6153.1124

−19394.2693

7088.0445

0.36

 

−4452.2347

−14299.7786

5395.3093

0.38

 

   High physical activity class

−9653.5430

−22437.0465

3129.9606

0.14

 

−5732.9247

−16532.4796

5066.6302

0.30

 
  1. BMI body mass index
  2. a Linear regression
  3. b Box-Cox linear regression using transformation coefficient of 1.62
  4. c Box-Cox linear regression using transformation coefficient of −0.79
  5. e Tobit regression
  6. f Box-Cox linear regression using transformation coefficient of 3.18
  7. h The proportion of variance explained by the whole model
  8. i The proportion of variance explained by the predictor variable. Calculated as the difference between the proportion of variance explained by the whole model and the proportion of variance explained by a model including all the predictor variables, except for the predictor in question
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BMC Public Health

ISSN: 1471-2458

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