Table 2.

Comparison of HGs peak force levels and HGs-AUCs for different disease severity states measured by FIQR.

FIQR vs HGs peak force levels	n	Minimum	25th percentile	Median	75th percentile	Maximum
High severity	39	6.36	9.52	11.51	13.68	20.57
Mild severity	11	9.54	14.61	18.52	21.39	25.84
Moderate severity	33	5.39	10.27	13.08	15.21	21.42
Remission	27	10.72	17.18	18.80	22.05	23.98
Test statistic	37.88
Corrected for ties Ht	37.88
Significance level	p < 0.0001
FIQR vs HGs-AUC	n	Minimum	25th percentile	Median	75th percentile	Maximum
High severity	39	157.06	239.48	275.55	334.08	518.78
Mild severity	11	233.73	371.17	442.12	503.91	642.91
Moderate severity	33	134.58	248.36	324.96	384.77	537.55
Remission	27	258.70	422.57	468.11	525.58	594.30
Test statistic	37.62
Corrected for ties Ht	37.62
Significance level	p < 0.0001

Abbreviations: HGs = handgrip strength, AUC = area under the curve, FIQR = revised Fibromyalgia Impact Questionnaire.