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Table 2 NIHSS score comparison before and after ITT among AIS patients by hospital transportation mode during corresponding periods in 2020 and 2021

From: The effects of the coronavirus disease pandemic on intravenous thrombolytic therapy among patients with acute ischemic stroke in Dalian, China

Before thrombolysis NIHSS score

Mode of transportation to the hospital

2020 (n = 724)

2021 (n = 1687)

N (%)

Change in NIHSS score after thrombolysis

P value

N (%)

Change in NIHSS score after thrombolysis

P value

Decrease or no change

Increase

Decrease or no change

Increase

≤ 5 points

No ambulance support

351 (56.9)

341 (97.2)

10 (2.8)

< 0.001

818 (58.7)

792 (96.8)

26 (3.2)

< 0.001

"120″ ambulance services

29 (27.1)

29 (100)

0 (0)

0.016

90 (30.7)

87 (96.7)

3 (3.3)

< 0.001

6–14 points

No ambulance support

182 (29.5)

177 (97.3)

5 (2.7)

< 0.001

438 (31.4)

429 (97.9)

9 (2.1)

< 0.001

"120″ ambulance service

35 (32.7)

30 (85.7)

5 (14.3)

0.5455

125 (42.7)

121 (96.8)

4 (3.2)

< 0.001

≥ 15 points

No ambulance support

84 (13.6)

82 (97.6)

2 (2.4)

< 0.001

138 (9.9)

135 (97.8)

3 (2.2)

< 0.001

"120″ ambulance services

43 (40.2)

40 (93)

3 (7)

0.012

78 (26.6)

74 (94.9)

4 (5.1)

< 0.001

  1. NIHSS National Institutes of Health Stroke Scale, ITT Intravenous thrombolytic therapy, AIS Acute ischemic stroke