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Table 2 Baseline characteristics and completeness of "dual" BMI ascertainment (i.e. BMI measurement on both screening episodes). Significance levels from multiple regression models.

From: Mid-term Body Mass Index increase among obese and non-obese individuals in middle life and deprivation status: A cohort study

  Women (n = 16,932) Men (n = 13,812)
  Without "dual" BMI ascertainment Dual BMI ascertainment p Without "dual" BMI ascertainment Dual BMI ascertainment p
Mean age (years) 45.3 44.6 0.717 45.3 44.2 0.001
% current smokers 14.3 36.1 0.980 18.6 44.4 0.024
% with SBP>140 mmHg 23.0 15.7 <0.001 30.9 22.3 <0.001
% with DBP>90 mmHg 12.0 8.1 * 21.7 15.1 *
% cholesterol > 6.5 mmol/l 7.6 15.2 0.064 11.5 21.2 0.253
% BMI >30 kg/m 2 4.8 11.4 0.150 6.0 11.2 <0.001
% in the two most deprived groups (4 and 5) 29.6 41.2 <0.001** 31.7 38.8 0.006**
  1. SBP: Systolic Blood Pressure; DBP: Diastolic Blood Pressure
  2. *Significant in multiple logistic regression model excluding SBP but omitted from presented model to avoid over-adjustment, as highly correlated with SBP.
  3. ** Deprivation group (quintile) entered as a continuous variable.