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. 2023 Jun 9;5(23):511–515. doi: 10.46234/ccdcw2023.096

Table 1. Background characteristics of the patients.

Characteristic BF.7.14 infection BA.5.2.48 infection Statistic P value
Abbreviation: M=median; IQR=interquartile range; BMI=body mass index (only applied to ≥18 years old); Inline graphic=average; SD=standard deviation; COVID-19=coronavirus disease 2019.
* χ2 test.
Student's t-test.
§ χ2 test with contingency correction.
Age [years old, (M, IQR)] 41 (30.8–55.3) 41 (29.5–52.0) 11454.500* 0.729
Male (n, %) 150 (62.0) 60 (61.9) <0.001* 0.983
BMI [kg/m², (Inline graphic, SD)] 24.7 (3.9) 24.5 (4.4) −0.353 0.724
COVID-19 vaccination (n, %) 0.402§ 0.526
None 21 (8.9) 8 (8.3)
1 dose 4 (1.7) 1 (1.0)
2 doses 47 (20.0) 18 (18.8)
≥3 doses 163 (69.4) 69 (71.9)
Comorbidities (n, %)
Hypertension 44 (18.2) 11 (11.3) 2.385* 0.123
Metabolic disorders 23 (9.5) 9 (9.3) 0.004* 0.949
Cardiovascular diseases 14 (5.8) 5 (5.2) 0.052* 0.820
Cerebrovascular diseases 7 (2.9) 1 (1.0) 0.390* 0.532
Lung diseases 8 (3.3) 3 (3.1) <0.001§ >0.999
Tumors 3 (1.2) 2 (2.1) 0.005§ 0.945
Rheumatic diseases 1 (0.4) 3 (3.1) 2.276§ 0.131
Health-related behaviors
Smoking 61 (25.2) 15 (15.5) 3.779* 0.052
Alcohol consumption 65 (26.9) 19 (19.6) 1.965* 0.161
Routine exercise 136 (56.2) 48 (49.5) 1.258* 0.262
Education level (n, %) 4.661* 0.198
Junior high school or below 97 (40.1) 31 (32.0)
Senior high school (or equivalent) 63 (26.0) 21 (21.6)
Undergraduate 70 (28.9) 38 (39.2)
Postgraduate 12 (5.0) 7 (7.2)