Table 6.

Regression algorithms for converting NIHSS data into AQoL scores

Model	Predictor	β	SE	t	Sig.
NIHSS Index
All stroke	(Constant)	0.4639	0.0044	104.97	0.000
	NIHSS	0.0024	0.0020	1.20	0.230
	NIHSS*NIHSS	-0.0000	0.0000	-1.22	0.224
		0.7856		F849,1718 = 8.45	0.000
		Obs = 1302	Ids = 705	F2,595 = 1.35	0.259
			R2within = 0.00	R2between = 0.17	R2overall = 0.12
NIHSS = 0–5	(Constant)	0.4754	0.0066	72.07	0.000
	NIHSS	0.0802	0.0178	4.52	0.000
	NIHSS*NIHSS	-0.0170	0.0046	-3.68	0.000
		0.7955		F652,540 = 6.27	0.000
		Obs = 1195	Ids = 653	F2,540 = 11.41	0.000
			R2within = 0.04	R2between = 0.00	R2overall = 0.00
NIHSS ≥ 6	(Constant)	0.2882	0.0874	3.30	0.001
	NIHSS	-0.0247	0.0133	-1.85	0.064
	NIHSS*NIHSS	0.0005	0.0004	1.19	0.234
		0.7680	-	-	-
		Obs = 103	Ids = 88	Wald χ2 = 11.58	0.003
			R2within = 0.00	R2between = 0.12	R2overall = 0.12
NIHSS Item
All stroke	(Constant)	0.4499	0.0059	76.81	0.000
	Visual fields	-0.0475	0.0232	-2.05	4.53
	Facial weakness	0.0909	0.0201	4.53	0.000
		0.8103		F704,595 = 6.86	0.000
		Obs = 1302	Ids = 705	F2,595 = 10.89	0.000
			R2within = 0.04	R2between = 0.03	R2overall = 0.01
NIHSS = 0–5	(Constant)	0.4810	0.0055	88.15	0.000
	Facial weakness	0.0984	0.0232	4.24	0.000
	Limb ataxia	0.0630	0.0273	2.31	0.021
		0.7984		F652,540 = 6.67	0.000
		Obs = 1195	Ids = 653	F2,540 = 12.42	0.000
			R2within = 0.04	R2between = 0.01	R2overall = 0.01
NIHSS ≥ 6	(Constant)	0.0732	0.0496	1.48	0.191
	Consciousness	-0.3052	0.0572	-5.34	0.002
	Eye movements	0.3073	0.0846	3.63	0.011
	Facial weakness	-0.1033	0.0263	-3.93	0.008
	Motor – Left arm	0.0760	0.0208	3.65	0.011
	Motor – Right leg	-0.3157	0.0364	-8.66	0.000
	Motor – Left leg	0.2980	0.0415	7.18	0.000
	Sensory	-0.1340	0.0310	-4.33	0.005
	Language	0.1336	0.0319	4.19	0.006
	Extinction/Inattention	-0.1198	0.0270	-4.44	0.004
		0.6653		F87,6 = 32.07	0.000
		Obs = 103	Ids = 88	F9,6 = 10.36	0.005
			R2within = 0.94	R2between = 0.05	R2overall = 0.05