Effectiveness of Strengthening Exercises for the Elderly with Low Back Pain to Improve Symptoms and Functions: A Systematic Review

Table 7

Overall findings of strength of evidence (descriptive statistics).

(number of articles)	3
Mean	5.67
95% confidence interval for mean
Lower bound	1.87
Upper bound	9.46
Median	6
Standard deviation	2.33
Variance	1.528
Minimum	4
Maximum	7