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Table 2 Characteristics of the participants (N = 688)

From: Awareness, understanding and use of sodium information labelled on pre-packaged food in Beijing:a cross-sectional study

  Total population (N = 688) Community residents (n = 380) Supermarket shoppers (n = 308)
Sex (Male), % 31.2 26.3** 37.3
Age (year), mean ± SD 39.9 ± 15.0 42.5 ± 16.1** 36.7 ± 12.7
Educational level, %
 Junior high school or below 18.6 13.9** 24.4
 High or technical school 25.7 23.9 27.9
 Junior college 16.3 16.1 16.6
 Undergraduate 29.8 35.5 22.7
 Graduate or above 9.6 10.5 8.4
Household monthly income (Yuan) per capita, %
 ≤ 5000 59.7 57.4** 62.7
 50,001–10,000 26.3 31.6 19.8
 10,0001–20,000 10.6 7.6 14.3
 ≥ 20,0001 3.3 3.4 3.2
BMI (kg/m2), mean ± SD 23.1 ± 3.2 23.2 ± 3.2 23.1 ± 3.2
Existing health problems, %
 Hypertension 51.6 55.0* 47.4
 Cardiovascular disease 40.8 43.4 37.7
 Chronic kidney disease 12.4 13.4 11.0
Knowledge, attitude and behavior towards salt intake
 Know recommended daily salt intake, % 69.3 72.6* 65.3
 Score of attitude towards salt intake, mean ± SD a 66.1 ± 19.9 68.2 ± 19.5** 63.6 ± 20.1
 Salt reduction behavior, % b 67.9 73.9** 60.4
  1. * p < 0.05; ** p < 0.01 when compared between community residents and supermarket shoppers
  2. a The attitude towards salt intake was assessed by calculating the score of the participants’ answers to three questions and translated into 100 points
  3. b The behavior of usually controlling the salt intake in daily life