Effectiveness of Combined General Rehabilitation Gymnastics and Muscle Energy Techniques in Older Women with Chronic Low Back Pain

Table 2

Characteristics of the study participants. Comparison of the studied groups by the Student's t-test.

Parameter	Exercising group				Non-exercising controls
	N = 21				N = 20
	Mean	SD	MIN	MAX	Mean	SD	MIN	MAX	p
Body height [cm]	161.1	6.7	148	173	157.2	6.9	144	170	0.067
Body weight [kg]	72.2	10.4	56	91	74.4	10.4	55	90	0.510
BMI [kg/m^2]	27.5	3.0	21.9	34.7	30.0	3.0	21.8	34.1	0.010
Age [years]	69.1	3.9	65	75	67.8	3.3	65	75	0.240

N: number, SD: standard deviation, p: probability of a type I error, : statistically significant differences at α≤ 0.05, and : statistically significant differences at α≤0.01