Table 2

Descriptive statistics and poison multilevel regression-analysis of case-mix variables on consultation sessions (n=6,496)
Descriptive Poisson regression
Mean ± sd a Percentages Regression coefficient SE b P-value
Intercept −0.72 0.07
Patients’ demographics
Female (reference male) 65.2% 0.09 0.02 <0.001
Age (years) 44.8 ± 19.1 −0.00 0.00 0.002
Native ethnicity (reference immigrants) 88.5% 0.11 0.04 0.003
Educational level:
 Low (reference) 31.3%
 Medium 42.2% −0.08 0.02 <0.001
 High 23.7% −0.08 0.03 0.002
 Not specified 2.9% −0.05 0.06 0.422
Urbanicity:
 Low 34.8% 0.02 0.03 0.476
 Medium 24.9% −0.03 0.03 0.284
 Strong (reference) 39.9%
History in dietetics (reference no history) 22.3% 0.14 0.02 <0.001
Patients’ initiative
Start treatment initiated by the patient (reference by referrers initiative) 14.5% 0.13 0.03 0.024
Patients’ health
Communication problem (reference no communication problems) 3.9% −0.02 0.05 0.717
Psychiatric problem (reference no psychiatric problems) 9.2% 0.12 0.03 <0.001
Intellectual disability problem (reference no problems with respect to intellectual disability) 2.0% 0.06 0.07 0.385
Multiple diagnoses (reference single diagnosis) 52.0% 0.36 0.05 <0.001
Overweight c 30.6% 0.50 0.04 <0.001
Underweight, unwanted weight loss c 3.0% 0.06 0.07 0.434
Hypercholesterolemia c 2.8% −0.33 0.09 <0.001
Diabetes Mellitus c 2.5% −0.04 0.09 0.672
Irritable Bowel Syndrome c 1.6% −0.15 0.10 0.132
Food intolerance c 0.6% −0.31 0.16 0.054
Binge eating disorder c 0.5% 0.32 0.13 0.016
Overweight & Diabetes c 8.0% 0.07 0.04 0.052
Overweight & Hypercholesterolemia c 4.8% −0.00 0.05 0.935
Overweight & Hypertension c 4.3% 0.14 0.05 0.003
Overweight & Diabetes & Hypercholesterolemia c 4.3% 0.04 0.05 0.444
Overweight & Diabetes & Hypertension c 3.2% 0.14 0.06 0.015
Overweight & Binge eating disorder c 1.6% 0.14 0.07 0.043
Overweight & Irritable Bowel Syndrome c 1.3% 0.00 0.07 0.952
Therapists’ demographics
Age (years) 46.0 ± 6.1 −0.01 0.01 0.539
Female (male) 93.6% 0.60 0.30 0.048

asd standard deviation.

bSE standard error.

c The reference group is having another diagnosis or a combination of diagnoses.

Tol et al.

Tol et al. BMC Health Services Research 2012 12:317   doi:10.1186/1472-6963-12-317

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