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Table 1 Baseline characteristics of patients with stroke

From: Impact of the COVID-19 pandemic on emergency admission for patients with stroke: a time series study in Japan

Variables Pre-COVID-19 period COVID-19 period SMD P value
n 19,709 16,975   
Age, N, %    0.021 0.649
 0–44 308 (1.6) 242 (1.5)   
 45–54 916 (4.6) 752 (4.4)   
 55–64 1790 (9.1) 1508 (8.9)   
 65–74 4693 (23.8) 3986 (23.5)   
 75–84 6702 (34.0) 5846 (34.4)   
 85- 5300 (26.9) 4641 (27.3)   
Sex (Female), N, % 8395 (42.6) 7234 (42.6)  < 0.001 0.976
BMI, N, %    0.046 0.002
 < 18.5 2264 (11.7) 1964 (11.7)   
 18.5–24.9 11,111 (57.2) 9521 (56.8)   
 25–29 3704 (19.1) 3403 (20.3)   
 30–34 679 (3.5) 547 (3.3)   
 35 and over 693 (3.6) 600 (3.6)   
 NA 970 (5.0) 714 (4.3)   
mRS at admission, N, %    0.028 0.324
 0 8658 (44.1) 7458 (44.0)   
 1 3650 (18.6) 3073 (18.1)   
 2 2451 (12.5) 2186 (12.9)   
 3 1896 (9.6) 1704 (10.1)   
 4 1936 (9.9) 1674 (9.9)   
 5 842 (4.3) 663 (3.9)   
 Other 221 (1.1) 185 (1.1)   
CCI, N, %    0.014 0.618
 0 16,717 (84.8) 14,362 (84.6)   
 1 2538 (12.9) 2191 (12.9)   
 2 399 (2.0) 377 (2.2)   
 3 55 (0.3) 45 (0.3)   
Admission pathway, N, %    0.049 0.002
 Home 16,315 (82.8) 14,103 (83.1)   
 Facility 1456 (7.4) 1323 (7.8)   
 Transfer 1917 (9.7) 1524 (9.0)   
 Else 21 (0.1) 25 (0.1)   
Stroke of onset time, N, %    0.052  < 0.001
 3 days or less 16,629 (84.6) 14,438 (85.2)   
 4–7 days 928 (4.7) 861 (5.1)   
 8 days or more 1796 (9.1) 1471 (8.7)   
 Asymptomatic 302 (1.5) 172 (1.0)   
Ambulance, N, % 9950 (50.5) 8853 (52.2) 0.033 0.002
  1. BMI body mass index, JCS Japan Coma Scale, BI Barthel Index, CCI Carlson Comorbidity Index, SMD standardised mean difference