Table 2.

Principal component analysis on Involvement Evaluation Questionnaire (IEQ) items

Items	Factors
	Tension	Supervision	Worrying	Urging
Percentage of variance (total = 46.55%)	24.95%	6.07%	8.10%	7.42%
How often during the past 4 weeks:
(30) has the atmosphere been strained between both	0.786
(32) been annoyed by relative's behavior	0.736
(35) thought of moving out	0.7
(31) has your relative caused a quarrel	0.679
(34) felt threatened by your relative	0.564	0.439
(27) carried out tasks normally done by your relative	0.49
(33) heard from others they have been annoyed	0.478
(16) have you encouraged your relative to take proper care				0.7
(18) to eat enough				0.64
(21) ensured that your relative has taken required medicines				0.615
(19) encouraged your relative to undertake some kind of activity				0.61
(17) helped your relative to take proper care of him/herself		0.49		0.577
(24) ensured your relative received sufficient sleep				0.554
(38) worried about the help/treatment your relative receives			0.47	0.443
(37) worried about your relative's safety				0.406
(40) have you worried about your relative managing financially			0.774
(41) worried about your relative's future			0.727
(42) worried about your own future			0.684
(39) worried about your relative's general health			0.46
(43) have your relative's mental health problems been a burden	0.427		0.436
(26) have you guarded your relative from taking illegal drugs		0.713
(25) guarded your relative from drinking too much alcohol		0.627
(23) guarded your relative from self-inflicted harm		0.621
(22) guarded your relative from committing dangerous acts		0.529

Bold type indicates the factor to which the item was allocated in cases where it loaded ≥ 0.4 in two or more factors; items loading < 0.4 in any factor are not shown (20: accompanying on outside activities; 28: encouraging to get up in the morning; 29: sleep disturbance due to relative's behavior).