Table 4

Principal component analyses of CGSQ for control group and patient group

	Patient group			Control group
	F1	F2	F3	F1	F2	F3	F4
Item 1 Personal Time Interrupted	0.876			0.895
Item 2 Missed Work, Neglect Duties	0.784			0.816
Item 3 Family Routines Disrupted	0.823			0.693
Item 4 Family Having to Do Without Things	0.826			0.644
Item 5 Family Suffering Negative Health Effects	0.689				0.667
Item 6 Child Getting into Trouble	0.775				0.633
Item 7 Financial Strain	0.794				0.662
Item 8 Less Attention to Family Members	0.747				0.522
Item 9 Disrupt Family Relationships	0.801				0.499
Item 10 Disrupt Family Social Activities	0.785			0.676
Item 11 Social Isolation	0.824			0.503
Item 12 Felt Sad or Unhappy		0.851			0.482
Item 13 Felt Embarrassed			0.820			0.494
Item 14 Relate well to Child*			0.830			0.592
Item 15 Angry towards Child			0.761			0.778
Item 16 Worried about Child Future		0.861					0.896
Item 17 Worried about Family Future		0.837					0.664
Item 18 Felt Guilty about child’s illness		0.871				0.706
Item 19 Felt Resentful toward child			0.770			0.792
Item 20 Felt Tired or Strained		0.743		0.509
Item 21 Toll on Family		0.764			0.633

*This item is the only reverse scoring item in the original scale, and it has been modified as forward scoring description in the Chinese version.
CGSQ, Caregiver Strain Questionnaire.