Table 4.

Intraclass Correlation Coefficients of Test–Retest Data

Subscales	Questionnaire items	Intraclass correlation coefficient (ICC)	P‐value
II‐1 Symptoms	Component 1_Nervous score (10 items)	0.791	<0.0001
	Component 2_Skin‐related score (8 items)	0.863	<0.0001
	Component 3_Head‐related score (7 items)	0.705	<0.0001
	Component 4_ Auditory vestibular score (8 items)	0.585	<0.0001
	Component 5_Musculoskeletal score (8 items)	0.716	<0.0001
	Component 6_Allergy‐related score (6 items)	0.815	<0.0001
	Component 7_Sensory score (4 items)	0.641	<0.0001
	Component 8_ Heart/chest‐related score (6 items)	0.708	<0.0001
	Total score of Symptoms (57 items)	0.773	<0.0001
II‐2 EMF‐producing objects	q58_Computers	0.573	<0.0001
	q59_Electric appliances	0.623	<0.0001
	q60_Fluorescent lighting	0.789	<0.0001
	q61_Microwave ovens	0.816	<0.0001
	q62_Mobile phones	0.645	<0.0001
	q63_Power lines	0.658	<0.0001
	q64_Radio/Television transmitters	0.389	0.0012
	q65_Telecommunication masts	0.421	0.0003
	q66_Televisions	0.620	<0.0001
	Total score of EMF‐producing objects (9 items)	0.709	<0.0001
II‐3 Reaction to EMFs	q67_Sensitive to EMFs	0.656	<0.0001
	q70_ Occurrences of static electric shock	0.719	<0.0001
	q71_Negative health change around EMFs	0.417	0.0003
	Total score of Reaction to EMFs (5 items) a	0.655	<0.0001
III General health	1_ Well‐being	0.829	<0.0001
	2_ Good health	0.670	<0.0001
	3_1 Sleep	0.703	<0.0001
	3_2 Sleeping hours per day	0.746	<0.0001
	3_3 Sleep disorder	0.715	<0.0001
IV‐1 THI‐D	Total score of THI‐D (10 items)	0.783	<0.0001

Test–retest reliability was estimated by calculating intraclass correlation coefficients (ICC); significance of ICC was determined using an F‐test. A total of 173 people from the general population participated in this study (see text).

EMF, electromagnetic field; THI‐D, todai health index‐depression scale.

^aTotal score of reaction to EMF score: calculated by adding scores of q67–q71.