Table 3.

Comparison of carer strain index measures^* at baseline and 3 month follow up

Patient category	Baseline value			Change from baseline value at 3 months
	HaH	Hospital		HaH	Hospital	Difference (95% CI)
Hip replacement	(n=26) Median 1.00 (interquartile range 0.0-2.0)	(n=36) Median 1.00 (interquartile range 0.0-3.0)		(n=23) Median 0.00	(n=29) Median 1.00	Mann-Whitney U test P=0.34
Knee replacement	(n=33) Mean 1.27 (SD 2.39)	(n=25) Mean 1.64 (SD 1.98)		(n=28) Mean 0.25	(n=19) Mean −0.58	0.83 (−0.79 to 2.45)
Hysterectomy	(n=97) Mean 0.96 (SD 1.87)	(n=107) Mean 1.02 (SD 1.69)		(n=79) Mean 0.15	(n=79) Mean 0.28	−0.13 (−0.77 to 0.52)
Elderly medical	(n=32) Mean 3.53 (SD 2.76)	(n=28) Mean 3.89 (SD 2.79)		(n=23) Mean 0.96	(n=23) Mean −0.22	1.17 (−0.47 to 2.82)
Chronic obstructive airways disease	(n=10) Mean 5.00 (SD 3.59)	(n=10) Mean 6.50 (SD 3.50)		(n=6) Mean −0.33	(n=4) Mean 2.75	−3.08 (−8.19 to 2.02)

HaH=hospital at home. ^*Scale 0-13 (high score=high level of strain).