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Table 2: Comparison of the demographic and clinical characteristics of the study cohort stratified by time periods
2020 Pre-COVID 1/2 2019 Pre-COVID 1/2 P Value 2020 COVID 3/4 2019 Pre-COVID 3/4 P Value 2020 COVID 3/4 2020 Pre-COVID 1/2 P Value
No. 234 180 123 213 123 234 
Mean age (range) (yr) 66.1 (18–98) 65.7 (22–98) .81 66.4 (25–97) 63.8 (20–101) .18 66.4 66.1 .87
Sex (No.) (%) 
    Male 102 (44) 73 (41) .54 67 (54) 95 (45) .08 67 (54) 102 (44) .05
    Female 132 (56) 107 (59) 56 (46) 118 (55) 56 (46) 132 (56)
Location (No.) (%) 
    ED 192 (82) 157 (87) .15 89 (72) 182 (85) .003 89 (72) 192 (82) .03
    Inpatient 42 (18) 23 (13) 34 (28) 31 (15) 34 (28) 42 (18)
Mean NIHSS 4.7 4.4 .65 7.3 5.2 .045 7.3 4.8 .01
Positive imaging findings (No.) (%) 42 (18) 32 (18) .96 42 (34) 37 (17) <.001 42 (34) 42 (18) <.001
Note:—ED indicates emergency department; NA, not available.