Table 2. The distribution of age, smoking habits, BMI, fat free mass and leukocyte telomere length among participants classified by current volume of LTPA in the clinical study 2008.

	MET I (n=144)	MET II (n=92)	MET III (n=130)	MET IV (n=129)	MET V (n=89)	p-value for trend (MET I-V)
Mean age (SD), years p-value n	73.3 (5.7) 144	72.7 (5.7) 1.000 92	72.2 (6.1) .464 130	71.7 (5.6) .064 129	70.6 (5.3) <.001 89	.006 584
Smokers % (n) p-value n	8.6(12) 140	6.5(6) 1.000 92	6.3(8) 1.000 128	7.9(10) 1.000 127	4.5(4) .748 88	.802 575
Mean BMI, kg/m2 (SD) p-value n	27.7 (4.3) 144	26.9 (3.4) .296 92	26.6 (3.4) .040 130	25.8 (3.4) <.001 129	25.5 (2.9) <.001 89	<.001 584
Mean fat free mass (SD) Age-adjusted p-value n	61.1 (7.4) 141	60.3 (6.9) 1.000 91	60.8 (7.5) 1.000 126	60.5 (8.0) .636 124	60.4 (5.7) .428 87	.506 569
Mean LTL (SD) p-value Age-adjusted p-value n Covariate-adjusted p-value n	.77 (.14) 139 126	.78 (0.13) 1.000 1.000 89 1.000 81	.78 (.13) 1.000 1.000 127 1.000 110	.77 (.12) 1.000 1.000 129 1.000 116	.80 (.13) .556 1.000 87 .772 81	.652 .788 571 .667 514

Percentage differences were tested using cross-tabulation and Chi-Square test. Means were compared by one-way ANOVA, and post hoc tests by Bonferroni correction. Ad. justing with other variables was done by general linear model. BMI = body mass index; MET = metabolic equivalent; LTL = leukocyte telomere length. MET I < 6 METh/week; MET II 6.1-12.0 METh/week; MET III 12.1-22.5 METh/week; MET IV 22.6-45.0 METh/wk; MET V > 45.1 METh/week. p-values are compared to MET I group.Covariate-adjusted for age, fat free mass, smoking, alcohol intake, high sensitive C-reactive protein, educational attainment and marital status.