Table 3.

Item fit statistics of the developmental HidroQoL© (15 items) following item reduction with the Rasch model

Item	Location	SE	FitResid	chi-square	p*
My holidays are affected (e.g. planning, activities)	0.51	0.085	−0.51	8.96	0.44
My hobbies are affected	0.02	0.085	1.72	8.62	0.47
I avoid public speaking (e.g. presentations)	0.39	0.077	1.15	16.71	0.05
My work is affected	0.54	0.085	0.74	11.44	0.25
I avoid meeting new people	1.20	0.083	−0.31	5.62	0.78
I feel nervous	−0.72	0.091	−1.99	16.91	0.05
I feel frustrated	−1.03	0.095	−2.30	14.41	0.11
Sweating is constantly on my mind	−1.05	0.096	−1.08	7.59	0.58
My appearance is affected	−0.41	0.088	0.93	8.82	0.45
I worry about leaving sweat marks on things	−1.08	0.096	0.76	9.79	0.37
I worry about people’s reactions	−2.02	0.103	−0.84	14.21	0.11
I feel uncomfortable physically expressing affection (e.g. hugging others)	0.01	0.088	−1.07	9.62	0.38
My sex life is affected	1.62	0.079	0.87	11.17	0.26
I worry about the additional chores in dealing with my condition	1.81	0.086	0.05	7.92	0.54
I find it hard to do things without planning in advance	0.22	0.083	0.54	7.85	0.55

Location indicates the relative level of QoL impairment that each item is targeting, arranging from low (negative) to high impairment (positive)

*p, p value; FitResid, fit residual