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Table 1 General characteristics of the study population throughout the four waves

From: Secular trend in dietary patterns of Iranian adults from 2006 to 2017: Tehran lipid and glucose study

 

Wave1

(2006–2008)

Wave2

(2009–2011)

Wave3

(2012–2014)

Wave4

(2015–2017)

P for trend

Participants (n)

2215

1242

1833

1218

 

Age (year)

38.0 ± 0.2

39.6 ± 0.3

42.7 ± 0.3

46.2 ± 0.3

< 0.001

Female (%)

52.7

54.0

52.4

51.1

0.001

Waist (cm)

88.2 ± 0.2

91.8 ± 0.3

92.5 ± 0.3

93.6 ± 0.3

< 0.001

Body mass index (kg/m2)

26.5 ± 0.1

27.0 ± 0.1

27.4 ± 0.1

27.7 ± 0.1

< 0.001

  1. Values are expressed as age-adjusted mean ± SE for continuous and percent for categorical variables. General estimate equation was used