Table 5.

Work and activity impairment among CU respondents relative to controls

	Matched comparisons			Regression estimates for CU relative to controls
	Controls (n = 508)	CU (n = 127)	p value	RR (95% CI)	p value
	Mean (SD)	Mean (SD)
Absenteeism (%) (ns = 360; 95)	7.9 (19.1)	7.6 (12.0)	0.879	0.89 (0.50–1.58)	0.697
Presenteeism (%) (ns = 362; 96)	20.2 (27.0)	36 (29.0)	<0.001	1.61 (1.20–2.17)	0.002
Overall work impairment (%) (ns = 360; 95)	24.1 (30.8)	38.9 (29.2)	<0.001	1.51 (1.14–2.01)	0.005
Activity impairment (%) (ns = 508; 127)	23.1 (27.4)	40.6 (31.2)	<0.001	1.5 (1.19–1.88)	0.001

CI confidence interval, CU chronic urticaria, RR rate ratio, SD standard deviation