Modified Poisson regression models assessing the association between mental health and addictions service use history and the prevalence of partial or no vaccination against SARS-CoV-2 in Ontario, Canada
| Variable | Prevalence ratio (95% CI) | ||
|---|---|---|---|
| Age and sex adjusted | Age, sex, rurality, SES and homelessness adjusted | Fully adjusted* | |
| MHA diagnosis (Ref. for all disorders: no MHA diagnosis) | |||
| Anxiety disorder | 1.00 (0.99–1.01) | 0.99 (0.98–0.99) | 1.13 (1.12–1.13) |
| Mood disorder | 0.91 (0.91–0.92) | 0.90 (0.90–0.90) | 1.01 (1.01–1.01) |
| Other disorder | 0.91 (0.91–0.92) | 0.90 (0.90–0.91) | 1.02 (1.01–1.02) |
| Psychotic disorder | 1.36 (1.34–1.37) | 1.19 (1.18–1.20) | 1.28 (1.27–1.29) |
| Substance use disorder | 1.48 (1.47–1.48) | 1.35 (1.34–1.35) | 1.49 (1.48–1.50) |
| Age, yr (Ref. for all age groups: 18–29 yr) | |||
| 30–39 | 1.00 (1.00–1.00) | 1.00 (1.00–1.00) | 1.04 (1.04–1.04) |
| 40–49 | 0.78 (0.78–0.78) | 0.79 (0.79–0.80) | 0.86 (0.86–0.86) |
| 50–59 | 0.61 (0.61–0.62) | 0.62 (0.62–0.63) | 0.71 (0.71–0.72) |
| 60–69 | 0.45 (0.45–0.45) | 0.45 (0.45–0.46) | 0.56 (0.56–0.56) |
| 70–79 | 0.34 (0.33–0.34) | 0.34 (0.34–0.34) | 0.45 (0.45–0.46) |
| ≥ 80 | 0.34 (0.34–0.35) | 0.34 (0.34–0.34) | 0.48 (0.47–0.48) |
| Sex, male | 1.14 (1.14–1.14) | 1.14 (1.14–1.14) | 1.03 (1.03–1.03) |
| Rural residence | 1.16 (1.16–1.17) | 1.15 (1.14–1.15) | |
| Income quintile (Ref. for all income levels: income quintile 1 [lowest]) | |||
| Quintile 2 | 0.86 (0.85–0.86) | 0.86 (0.86–0.86) | |
| Quintile 3 | 0.78 (0.78–0.78) | 0.79 (0.79–0.79) | |
| Quintile 4 | 0.72 (0.71–0.72) | 0.73 (0.73–0.73) | |
| Quintile 5 (highest) | 0.64 (0.64–0.64) | 0.65 (0.65–0.65) | |
| Individuals who experienced homelessness | 1.65 (1.63–1.66) | 1.81 (1.80–1.83) | |
| cADGs 4–6 (Ref. for all levels: 0–3 cADGs) | 0.64 (0.64–0.65) | ||
| cADGs ≥ 6 | 0.53 (0.52–0.53) | ||
| MHA severity (Ref. for all MHA severity: no MHA utilization) | |||
| Outpatient visit | 0.91 (0.91–0.92) | 0.91 (0.90–0.91) | 1.01 (1.01–1.01) |
| Emergency department visit | 1.33 (1.32–1.34) | 1.24 (1.24–1.25) | 1.42 (1.41–1.42) |
| Hospital admission | 1.38 (1.37–1.39) | 1.20 (1.19–1.21) | 1.40 (1.40–1.41) |
| Age, yr (Ref. for all age groups: 18–29 yr) | |||
| 30–39 | 1.02 (1.01–1.02) | 1.01 (1.01–1.01) | 1.05 (1.05–1.06) |
| 40–49 | 0.80 (0.79–0.80) | 0.81 (0.80–0.81) | 0.87 (0.87–0.88) |
| 50–59 | 0.63 (0.62–0.63) | 0.64 (0.63–0.64) | 0.73 (0.72–0.73) |
| 60–69 | 0.46 (0.46–0.46) | 0.46 (0.46–0.46) | 0.57 (0.57–0.57) |
| 70–79 | 0.34 (0.34–0.34) | 0.34 (0.34–0.34) | 0.46 (0.46–0.46) |
| ≥ 80 | 0.35 (0.35–0.35) | 0.35 (0.34–0.35) | 0.49 (0.48–0.49) |
| Sex, male | 1.15 (1.15–1.15) | 1.15 (1.15–1.15) | 1.04 (1.04–1.04) |
| Rural residence | 1.16 (1.16–1.16) | 1.14 (1.14–1.15) | |
| Income quintile (Ref. for all income levels: income quintile 1 [lowest]) | |||
| Quintile 2 | 0.86 (0.85–0.86) | 0.86 (0.86–0.86) | |
| Quintile 3 | 0.78 (0.78–0.78) | 0.79 (0.79–0.79) | |
| Quintile 4 | 0.72 (0.71–0.72) | 0.73 (0.73–0.73) | |
| Quintile 5 (highest) | 0.64 (0.64–0.64) | 0.65 (0.65–0.65) | |
| Individuals who experienced homelessness | 1.63 (1.61–1.64) | 1.73 (1.71–1.75) | |
| cADGs 4–6 (Ref. for all levels: 0–3 cADGs) | 0.64 (0.64–0.64) | ||
| cADGs ≥ 6 | 0.52 (0.52–0.52) | ||
Note: cADG = collapsed Aggregated Diagnosis Group, CI = confidence interval, MHA = mental health and addiction, Ref. = reference category, SES = socioeconomic status.
↵* Fully adjusted = all variables included in the model as shown here.