The effect of dual-task conditions on postural control in adults with low back pain: a systematic review and meta-analysis

Table 3 Quality assessment for each included study

Study	Selection				Comparability		Outcome measurement		Statistical analysis		Total score
Study	Patient definition^a	Representativeness of patients^b	Selection of controls^c	Definition of controls^d	Age and gender^e	Physical activity^f	Reliability of outcome measure^g	Validity of outcome measure^h	Sample sizeⁱ	Statistical method^j	Total score
Salavati et al. [14]	1	1	1	1	1	0	1	1	0	1	8*
Mazaheri et al. [11]	1	1	1	1	1	1	1	1	0	1	9*
Etemadi et al. [15]	1	0	0	0	1	0	1	1	1	1	6
Shanbehzadeh et al. [29]	1	0	0	0	1	0	1	1	0	1	5
Ge et al. [49]	1	1	1	1	1	0	1	1	0	1	8*
Percentage of articles meeting each NOS item	100%	60%	60%	60%	100%	20%	100%	100%	20%	100%

^*Indicates high-quality studies
^aThe inclusion/exclusion criteria are clearly defined
^bHow were cases selected? (e.g., random sample)
^cControls were derived from the same community as patients
^dControls defined as individuals with no history of low back pain
^eThe patient group and control group were adequately matched for age and gender
^fThe patient group and control group were adequately matched for physical activity
^gThe measure of postural control has documented reliability
^hThe measure of postural control has documented validity
ⁱThe sample size was justified
^jThe statistical analysis was clearly presented and was appropriate

ISSN: 1749-799X