. Author manuscript; available in PMC: 2017 Oct 24.

Published in final edited form as: Eur J Cardiovasc Prev Rehabil. 2009 Feb;16(1):16–20. doi: 10.1097/HJR.0b013e32830aba5c

Table 3.

Association of serum GGT with demographic or health behavior variables by age group in the control group: the Minnesota Heart Survey

	Baseline serum GGT level (U/l)
	<18	18 to <25	25 to ≤ 50	>50	P trend
Ageless than 70 years
Number of participants	38	40	34	12
Male (%)	50.0	82.5	91.2	91.7	<0.01
BMI (kg/m²)	25.6	27.7	28.7	28.8	<0.01
Obesity (BMI ≥ 25 kg/m², %)	52.6	77.5	88.2	91.7	<0.01
Smoker (%)	13.2	10.0%	14.7%	25.0%	0.38
Drinker (%)	36.8	57.5	64.7	75.0	<0.01
Physical activity score (MET hours/week)	9.6	8.1	5.6	7.2	0.18
Age more than or equal to 70 years
Number of participants	37	48	34	6
Male (%)	43.2	35.4	26.5	66.7	0.63
BMI (kg/m²)	26.6	26.4	27.9	30.4	0.05
Obesity (BMI > 25 kg/m², %)	70.3	60.4	76.5	100.0	0.20
Smoker (%)	2.7	6.3	0	0	0.46
Drinker (%)	21.6	31.3	26.5	33.3	0.48
Physical activity score (MET h/week)	5.2	9.6	8.1	4.9	0.48

GGT, gamma-glutamyltransferase; MET, metabolic equivalent.