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Table 4 Demographic characteristics (i.e. sex and age) of the total sample of individuals living in these three study regions in comparison to respondents’ characteristics

From: Self-reported data in environmental health studies: mail vs. web-based surveys

 

All sample a

Respondents

p-value

Sex b

0.371 d

 Male

11,496 (50)

518 (49)

 Female

11,456 (50)

546 (50)

Age c

  (years)

53.2 ± 18.4

59.3 ± 14.5

< 0.0001 e

  1. a Data obtained by the municipalities at the year the study has started (i.e. 2014) for the entire adult population (> 18 years old) living in three of the study regions (Keldsnor, Lindet and Sundeved)
  2. b Number of individuals (percentage)
  3. c Mean ± standard deviation
  4. d Pearson’s Chi-squared test of proportions
  5. e Two sample t-test
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BMC Medical Research Methodology

ISSN: 1471-2288

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