Table 4.

Effectiveness of prestroke antiplatelet use on discharge modified Rankin Scale (mRS) outcome

	Shift analysis			mRS 0-1 proportion			mRS 0-2 proportion
	OR*	95% CI	P value	OR	95% CI	P value	OR	95% CI	P value
Unadjusted analysis	1.13	0.93-1.37	0.21	1.03	0.82-1.29	0.83	0.98	0.79-1.22	0.85
Multivariable analysis†	0.90	0.72-1.14	0.38	1.27	0.94-1.72	0.118	1.21	0.90-1.63	0.20
Propensity score (PS)-matched analysis‡	0.94	0.71-1.23	0.64	1.24	0.87-1.79	0.24	1.20	0.84-1.70	0.32

OR, odds ratio; CI, confidence interval.

^*Odd ratios for achieving a favorable shifting of one level on the mRS score;

^†Adjusted for age, sex, initial National Institutes of Health Stroke Scale (NIHSS), onset to treatment time, tissue plasminogen activator (TPA) dose and variables with P<0.1 in the Table 1;

^‡PS matching samples included 324 pairs and were adjusted for age, sex, initial NIHSS score, onset to treatment time, history of diabetes, diastolic blood pressure and TPA dose.