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. 2019 Mar 6;9:3743. doi: 10.1038/s41598-019-40283-5

Table 4.

Clinical data comparison between patients with and without polypharmacy.

N Polypharmacy (all medications) Polypharmacy (long-term medications only)
Pw/oP PwP Statistics Pw/oP PwP Statistics
133 173 177 129
EDSSb 2.5 4.5 z = −7.991, p < 0.001U 3.0 6.0 z = −8.062, p < 0.001U
Disease coursec X2(2) = 74.871, p < 0.001Chi X2(2) = 78.310, p < 0.001Chi
   CIS/RRMS 119 (89.5) 73 (42.2) 148 (83.6) 44 (34.1)
   SPMS 14 (10.5) 66 (38.2) 21 (11.9) 59 (45.7)
   PPMS 0 (0.0) 34 (19.7) 8 (4.5) 26 (20.2)
Disease duration (Years)b 10 13 z = −2.234, p = 0.025U 9 15 z = −4.592, p < 0.001U
Comorbiditiesc p  < 0.001 Fi p  < 0.001 Fi
   Pw/oSI 76 (57.1) 33 (19.1) 97 (54.8) 12 (9.3)
   PwSI 57 (42.9) 140 (80.9) 80 (45.2) 117 (90.7)
Patient carec p  < 0.001 Fi p  < 0.001 Fi
   Outpatients 102 (76.7) 44 (25.4) 116 (65.5) 30 (23.3)
   Inpatients 31 (23.3) 129 (74.6) 61 (34.5) 99 (76.7)

CIS, clinically isolated syndrome; MS, multiple sclerosis; N, number of patients; PwP, patients with polypharmacy; PwSI, patients with secondary illnesses; Pw/oP, patients without polypharmacy; Pw/oSI, patients without secondary illnesses; PPMS, primary progressive MS; RRMS, relapsing-remitting MS; SPMS, secondary progressive MS.

bMedian; cnumber of patients (%) ChiChi-square test; FiFisher’s exact test; UMann-Whitney U test.