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. Author manuscript; available in PMC: 2024 Sep 1.
Published in final edited form as: Br J Haematol. 2023 Jun 7;202(5):937–941. doi: 10.1111/bjh.18899

Table 1.

Descriptive Statistics of Study Cohort Characteristics

SCD
(n = 201)
Control
(n = 201)
P value
Age, years 0.2590a
Median (SD) 34 (14) 35 (14)
Minimum-Maximum 18–80 18–81
Sex 0.0179b
Female 56.2% (n = 113) 68.2% (n = 137)
Male 43.8% (n = 88) 31.8% (n = 64)
Race and Ethnicity 0.0012b
Black or African American 95.0% (n = 191) 87.1% (n = 175)
Hispanic 2.0% (n = 4) 9.5% (n = 19)
Non-Black or African American, Non-Hispanic 3.0% (n = 6) 3.5% (n = 7)
COVID vaccine type 0.5963b
Pfizer-BioNTech 78.6% (n = 158) 80.6% (n = 162)
Moderna 19.4% (n = 39) 16.9% (n = 34)
Janssen (Johnson & Johnson) 2.0% (n = 4) 2.5% (n = 5)
Number of vaccine dose Time since last dose, mean days (SD) 0.6210b
1 dose 11.9% (n = 24) 9.5% (n = 19)
254 days (96) 225 days (135) 0.9373a
2 dose 50.7% (n = 102) 52.7% (n = 106)
293 days (121) 267 days (120) 0.3793a
3 dose 34.8% (n = 70) 35.8% (n = 72)
154 days (81) 108 days (103) 0.0071a
4 dose 2.5% (n = 5) 2.0% (n = 4)
17 days (86) 64 days (49) 0.9762a
a

Mann-Whitney test

b

Chi-square test