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Table 5 Univariate random effects meta-regression (methods of moments) and subgroup analyses for MARITAL STATUS (married/partnered)

From: Determinants of participation in voluntary work: a systematic review and meta-analysis of longitudinal cohort studies

 

Subgroup analyses

Results from meta-regression

Results

Heterogeneity

Variable

Subgroup

Number of studies

OR

95% CI

P-value

I 2

Coefficient

SD

P-value

Outcome measurement

Mixed

1

1.124

0.682–1.853

N.A.

N.A.

Reference

Formal

9 (14 different samples)

1.053

0.931–1.192

0.001

62%

−0.0650

0.3067

0.832

Proportion of volunteers (%) in baseline study sample

Continuous

9a (14 different samples)

1.087

0.968–1.221

0.045

43%

− 0.0002

0.0002

0.385

0–100%

8 (9 different samples)

1.071

0.917–1.250

0.001

70%

Reference

  

0%

2 (3 different samples)

1.052

0.902–1.227

0.381

0%

0.0468

0.1907

0.806

100%

2 (3 different samples)

1.080

0.564–2.066

0.175

43%

−0.1253

0.2095

0.550

Mean age at baseline

Continuous

8b (12 different samples)

1.147

1.001–1.315

0.112

35%

− 0.0008

0.0004

0.030

≤ 55 years

6 (8 different samples)

1.140

0.911–1.427

0.000

76%

Reference

  

>  55 years

5 (7 different samples)

0.999

0.913–1.092

0.539

0%

−0.1477

0.1419

0.300

Continent

USA

4

1.065

0.870–1.304

0.049

62%

Reference

Europe

6 (11 different samples)

1.054

0.904–1.230

0.009

57%

−0.0106

0.1314

0.936

Year of baseline measurement

Continuous

10 (15 different samples)

1.055

0.937–1.188

0.002

59%

0.0088

0.0096

0.361

<  2006

8 (11 different samples)

1.055

0.928–1.199

0.000

69%

Reference

  

≥ 2006

3 (4 different samples)

1.081

0.742–1.575

0.522

0%

0.0295

0.2251

0.896

Duration of follow-up

Continuous

10 (15 different samples)

1.055

0.937–1.188

0.002

59%

−0.0111

0.0115

0.335

≤ 3 years

3 (7 different samples)

0.990

0.830–1.180

0.274

20%

Reference

  

4–7 years

2

1.096

0.822–1.463

0.905

0%

0.0776

0.2315

0.737

≥ 8 years

5 (6 different samples)

1.082

0.896–1.306

0.000

81%

0.0580

0.1499

0.699

Risk of bias items

 Study participation

Unclear/high risk of bias

9 (12 different samples)

1.004

0.897–1.124

0.019

52%

Reference

Low risk of bias

2 (3 different samples)

1.353

1.105–1.657

0.478

0%

0.3106

0.1563

0.047

 Study confounding

Unclear/high risk of bias

2

0.846

0.766–0.935

0.763

0%

Reference

Low risk of bias

8 (13 different samples)

1.115

0.994–1.252

0.083

38%

0.2803

0.1113

0.012

  1. aThe study of Bartels et al. (2013) is not included in this analysis, because the proportion of volunteers (%) in the baseline study sample is not reported
  2. bThe studies of Bartels et al. (2013) and Hank & Erlinghagen (2010) are not included in this analysis, because the mean age at baseline is not reported
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BMC Public Health

ISSN: 1471-2458

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