Table 2.

Changes in the mean NIHSS total scores by time period for moderate and severe groups.

	Time (I)	Time (J)	MD (I-J)	SE	p Value	95% CI
Moderate group (n = 673)	Discharge	3 months	1.218 *	0.117	0.000 *	0.988–1.449
	3 months	6 months	0.229 *	0.083	0.006 *	0.065–0.397
	6 months	12 months	0.080	0.096	0.405	−0.109–0.269
	12 months	18 months	0.131	0.076	0.085	−0.018–0.280
	18 months	24 months	−0.083	0.072	0.250	−0.225–0.059
Severe group (n = 125)	Discharge	3 months	1.312 *	0.383	0.001 *	0.554–2.070
	3 months	6 months	0.376	0.286	0.191	−0.190–0.942
	6 months	12 months	−0.096	0.357	0.789	−0.804–0.612
	12 months	18 months	−0.008	0.311	0.979	−0.623–0.607
	18 months	24 months	−0.448	0.276	0.107	−0.994–0.098

* p < 0.05. MD—mean difference, SE—standard error, CI—confidence interval.