Table 2. Predictive characteristics for developing PCC in the population of Manitoba, Canada (univariate ORs and 95% CI).

	OR	95% CI
Sex
Male (ref.)
Female	1.60	1.54 to 1.66
Age group (years)
0–18	0.40	0.38 to 0.42
19–29	0.87	0.83 to 0.91
30–59 (ref.)
60–79	1.54	1.46 to 1.63
80+	2.20	2.01 to 2.41
Region of residence
Urban (ref.)
Rural	0.92	0.89 to 0.96
Income quintile
Q1 (lowest)	1.32	1.24 to 1.40
Q2	1.24	1.17 to 1.32
Q3	1.14	1.07 to 1.22
Q4	1.10	1.03 to 1.17
Q5 (highest) (ref.)
Not found	2.13	1.78 to 2.56
Missing	1.72	1.43 to 2.07
Regional Health Authority
Winnipeg Regional Health Authority (ref.)
Interlake-Eastern Regional Health Authority	0.86	0.80 to 0.92
Northern Health Region	1.11	1.05 to 1.18
Southern Health-Santé Sud	0.80	0.76 to 0.84
Prairie Mountain Health	0.98	0.91 to 1.04
Charlson Comorbidity Index
0 (no comorbidity) (ref.)
1	1.79	1.71 to 1.88
2	2.14	1.98 to 2.33
3+ (higher comorbidity)	3.20	2.94 to 3.47
Hospitalisation within 14 days of positive COVID-19 test	3.28	3.05 to 3.52
Number of COVID-19 vaccine doses before positive COVID-19 test
0 doses (ref.)
1 dose	0.93	0.87 to 0.99
2 doses	0.34	0.32 to 0.36
3+ doses	0.35	0.30 to 0.40
Recently immigrated to Manitoba (within 5 years of the study period)	0.84	0.77 to 0.91
First Nations	1.20	1.15 to 1.25

refreference group