Skip to main content

Table 1 Baseline Characteristics of those where invitation was not returned

From: A photograph of the researcher on the invitation letter did not affect the participation rate of a postal survey: a randomized study within a trial (SWAT)

 

With photograph n (%)

N = 4890

Without photograph n (%)

N = 4907

Females

2506 (51.3)

2444 (49.8)

Cities

1612 (33.0)

1612 (32.9)

Towns and suburbs

1633 (33.4)

1650 (33.6)

Rural areas

1645 (33.6)

1645 (33.5)

 

N, mean (SD)

N, mean (SD)

Age in years

4313a

4345a

 

55.3 (18.5)

55.1 (18.3)

  1. aParticipants from 3 population registration offices needed to be removed from this analysis as age was not transmitted from these
Back to article page

BMC Medical Research Methodology

ISSN: 1471-2288

Contact us