. 2011 Sep 13;12:95. doi: 10.1186/1471-2296-12-95

Table 1.

Covariates of the study participants at baseline used for matching.

Characteristics	Intervention group	Control group	P-value
n	186	2632

Age (years)	62.93 ± 11.85	66.97 ± 12.56	0.00*

Sex male Sex female	44.1% 55.9%	47.5% 52.5%	0.37

Socio-economic status **	2.69 ± 0.79	2.75 ± 1.02	0.46

Married	59.7%	46.7%	0.00*

Diabetes mellitus type 2 †	84.9%	81.0%	0.18

Prediabetes †	15.1%	19.0%	0.18

Asthma †	5.9%	5.1%	0.64

Cancer †	12.9%	13.3%	0.88

Cardiovascular disease †	22.0%	32.0%	0.01*

Cerebral ischemia †	5.4%	9.0%	0.09

COPD †	1.1%	7.6%	0.00*

Depression †	9.1%	7.6%	0.45

Hypertension †	48.4%	50.6%	0.55

Locomotor system complaints †	43.5%	37.7%	0.11

Lipid metabolism disorder †	26.3%	21.7%	0.14

Neurologic disorder †	7.5%	8.8%	0.55

Psychic disorder †	10.2%	8.4%	0.40

Smoking †	5.9%	5.1%	0.64

Data are means ± SD or frequencies (%).

* Groups differed significantly (P < 0.05).

** Socio-economic status based on postal code of patient on a scale of 1-4 (1 = -2 to -1 SD compared to total population of SGE, 2 = -1 to 0 SD compared to total population, 3 = 0 to +1 SD compared to total population, 4 = +1 to +2 SD compared to total population) [23].