Table 1

General characteristics of the study population (n = 1,537) by BMI categories
Underweight Normal weight Overweight Obese P value
n (%) 89 (5.8) 834 (54.3) 424 (27.6) 190 (12.4)
Age (years) (%)
  < 35 38.2 29.5 16.5 9.5 < 0.001
  35-44 13.5 25.4 21.9 21.6
  45-54 13.5 19.9 33.7 26.3
  ≥ 55 34.8 25.2 27.8 42.6
Residence
  Urban city 23.6 22.1 27.4 31.1 0.03
  Rural city 76.4 77.9 72.6 68.9
Socio-economic status
  Low 26.1 32.4 33.9 34.0 0.39
  Medium 38.6 31.0 34.8 33.0
  High 35.2 36.6 31.3 33.0
Education
  Low 50.6 54.9 59.4 65.3 0.002
  Medium 27.0 32.3 30.9 21.1
  High 22.5 12.8 9.7 13.7
Hemoglobin (g/L)1 125.0 (14.6) 124.9 (15.4) 128.4 (15.0) 131.9 (15.1) < 0.001
Energy (kcal/d) 1916 (563) 2124 (582) 2179 (639) 2198 (637) 0.001
Iron (mg/d) 20.0 (7.4) 23.4 (9.6) 24.2 (9.8) 23.8 (9.5) 0.003
Vitamin C (mg/d) 61 (33) 61 (38) 59 (39) 60 (36) 0.886

1Mean (SD), all such values; BMI, body mass index. Chi-square test for categorical variables and ANOVA for continuous variables.

Qin et al.

Qin et al. Nutrition Journal 2013 12:10   doi:10.1186/1475-2891-12-10

Open Data