Paraspinal strength and electromyographic fatigue in patients with sub-acute back pain and controls: Reliability, clinical applicability and between-group differences

Table 1 Anthropometric measures (mean ± SD) of participants

	Age (yr)	Height (cm)	Body mass (kg)	BMI (kg/m2)
Healthy
Male (n = 13)	27.0 ± 6.8a	178.4 ± 5.5	78.9 ± 8.7	24.7 ± 2.3
Female (n = 13)	24.6 ± 5.3b	163.0 ± 8.0	56.8 ± 5.7b	21.5 ± 3.5b
Total (n = 26)	25.8 ± 6.1b	170.7 ± 10.4	67.8 ± 13.4b	23.1 ± 3.3b
Patients
Male (n = 34)	35.7 ± 10.2	177.5 ± 6.4	81.1 ± 10.6	25.7 ± 2.6
Female (n = 32)	39.2 ± 10.9	166.2 ± 5.8	74.5 ± 13.6	26.9 ± 4.4
Total (n = 66)	37.4 ± 10.6	172.1 ± 8.4	77.9 ± 12.5	26.3 ± 3.6

Significantly different to patients’ corresponding data:

^aP = 0.01.

^bP < 0.01.

BMI: Body mass index.