Table 2: Baseline characteristics of exercise and control groups.

ExerciseControlDifferenceHeterogeneityInconsistency
VariableN 𝑋 ± S D Mdn (IQR)N 𝑋 ± S D Mdn (IQR) 𝑋 (95% CI)Q (p) 𝐼 2 (95% CI)

Age (years)1046.1 ± 6.145 (9)947.3 ± 6.047 (6)−0.5 (−2.1, 1.0)13.5 (0.14)33.1% (0, 68.1)
FM Symptoms (years)811.4 ± 5.19 (4)811.2 ± 3.810 (5)0.04 (−1.2, 1.2)5.1 (0.65)0% (0, 56.0%)
FM Diagnosis (years)44.2 ± 2.33 (4)35.1 ± 2.24 (4)−0.5 (−1.3, 0.3)1.4 (0.71)0% (0%, 72.0%)

Notes: FM, fibromyalgia syndrome; N, number of groups reporting data; 𝑋 ± S D , mean ± standard deviation; Mdn (IQR), median and interquartile range; 𝑋 (95% CI), mean and 95% confidence intervals; Q (p), heterogeneity statistic and alpha value; 𝐼 2 (95% CI), percent inconsistency and 95% confidence interval.