Involvement of the wrist and hand joints and tendons in an Egyptian systemic lupus erythematosus cohort

Egyptian Rheumatology and Rehabilitation

Table 1 Distribution of the studied groups according to age, manual labour and grip and pinch dynamometry

	Symptomatic (No. = 14)		Asymptomatic (No. = 16)		Control (No. = 38)		Test of sig.	p
	No.	%	No.	%	No.	%	Test of sig.	p
Age (years)	41.57 ± 6.05		39.88 ± 13.11		36.32 ± 12.63		F = 1.229	0.299
Intensity of manual activity
Mild	3	21.4	5	31.3	10	26.3	X² = 3.731	^MCp = 0.738
Moderate	5	35.7	3	18.8	9	23.7
Severe	4	28.6	5	31.3	7	18.4
Very severe	2	14.3	3	18.8	12	31.6
Mean grip strength (lb)	19.66 ± 12.24		21.90 ± 14		46.20 ± 11.44		F= 36.09*	< 0.001*
Mean grip strength (lb)	p₁ = 0.870, p₂< 0.001, p₃< 0.001						F= 36.09*	< 0.001*
Mean pinch strength (lb)	8.57 ± 4.01		10.18 ± 3.15		13.88 ± 2.34		F= 20.34*	< 0.001*
Mean pinch strength (lb)	p₁ = 0.296, p₂< 0.001, p₃< 0.001						F= 20.34*	< 0.001*

Pairwise comparison between 2 groups was done using post hoc test (Tukey)
χ² chi-square test; MC Monte Carlo; F F for ANOVA test; p p value for comparing between the studied groups, significance at p < 0.05; p₁p value for comparing between symptomatic and asymptomatic; p₂p value for comparing between symptomatic and control; p₃p value for comparing between asymptomatic and control; No. number; % percent; Lb pound