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Table 3 Multivariate analysis of characteristics of patients with and without valid GODIN, DINE fibre and DINE fat scores at baseline

From: Using postal questionnaires to evaluate physical activity and diet behaviour change: case study exploring implications of valid responder characteristics in interpreting intervention outcomes

Instrument GODIN DINE fibre DINE total fat
Patient characteristics** Coefficient p-value Coefficient p-value Coefficient p-value
Age −0.010 0.238 −0.01 0.695 −0.006 0.616
Gender Male −0.044 0.801 0.174 0.440 −0.070 0.744
Female Ref*   Ref   Ref  
History of MI Yes 0.040 0.790 −0.258 0.198 −0.235 0.208
No Ref   Ref   Ref  
History of diabetes Yes −0.037 0.854 −0.506 0.039 −0.457 0.047
No Ref   Ref   Ref  
Elevated systolic BP*** Yes 0.074 0.680 0.082 0.735 0.009 0.966
No Ref   Ref   Ref  
Elevated diastolic BP*** Yes −0.318 0.218 −0.379 0.238 −0.330 0.267
No Ref   Ref   Ref  
Elevated cholesterol*** Yes −0.283 0.140 −0.324 0.178 −0.455 0.039
No Ref   Ref   Ref  
Smoker Smoker −0.109 0.636 −0.682 0.013 −0.529 0.045
Non-smoker Ref   Ref   Ref  
BMI >25 kg/m2 Yes −0.239 0.222 −0.005 0.983 −0.225 0.368
No Ref   Ref   Ref  
Study arm Intervention −0.159 0.293 0.141 0.488 −0.023 0.909
Control Ref   Ref   Ref  
Marital status Married/living with partner 0.233 0.204 −0.228 0.366 0.025 0.911
Single/widowed/separated/divorced Ref   Ref   Ref  
Age left school (years) 14 and under Ref   Ref   Ref  
15 to 17 0.240 0.147 −0.004 0.987 0.024 0.905
18 and over 0.508 0.047 0.134 0.712 0.475 0.179
Occupation Manual Ref   Ref   Ref  
Non manual 0.226 0.243 0.306 0.267 0.275 0.250
  1. *Total N = 832; numbers for some characteristics are less due to incomplete data; Ref refers to reference category for valid responses for each characteristic.
  2. **Baseline data; ***Elevated SBP defined as systolic blood pressure >140 mmHg; elevated DBP defined as diastolic blood pressure >90 mmHg; elevated cholesterol defined as serum cholesterol >5.0 mmol/l.
  3. Figures in bold are statistically significant.