Table 3 Pre-existing medical conditions.

Pre-existing medical conditions	Normal and Preobese	N	Obese	N	Significance (Chi² Sign.)
Pre-existing medical conditions	BM < 30 (%)	N	BMI ≥ 30 (%)	N	Significance (Chi² Sign.)
Coronary heart disease	21.1	30/142	18.4	9/49	0.679
Cardiac insufficiency	13.4	19/142	24.5	12/49	0.069
Endocarditis	1.4	2/142	6.1	3/49	0.075
Chronic cystitis	5.6	8/142	4.1	2/49	0.674
Chronic renal failure	16.2	23/142	24.5	12/49	0.196
Dialysis	1.4	2/142	4.1	2/49	0.260
Diabetes mellitus (IDDM + NIDDM)	10.6	15/142	28.6	14/49	0.002
NIDDM	4.9	7/142	4.1	2/49	0.809
Malignoma	23.2	33/142	18.4	9/49	0.478
Osteoporosis	6.3	9/142	2.0	1/49	0.244
Ethanol abuse	9.2	13/142	2.0	1/49	0.099
Intravenous drug abuse	7.0	10/142	0.0	0/49	0.056
Stroke	5.6	8/142	6.1	3/49	0.899
COPD	11.3	16/142	16.3	8/49	0.357
HIV	2.1	3/142	0.0	0/49	0.305
Hepatitis B	9.9	14/142	0.0	0/49	0.022
Liver cirrhosis	4.9	7/142	6.1	3/49	0.747
Rheumatoid disease	6.3	9/142	8.2	4/49	0.662
M. Parkinson	2.8	4/142	0.0	0/49	0.235
Organ transplant	2.1	3/142	4.1	2/49	0.457

Most concomitant diseases appear similarly in both cohorts. Diabetes mellitus (Insulin Dependent Diabetes Mellitus) occurs significantly more often in obese patients, and hepatitis B occurs significantly more often in normal weight people. Cardiac insufficiency and endocarditis occur more often in obese patients (but this is not statistically significant). Ethanol and intravenous drug abuse occur more often in the normal weight group.

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