Table 3. Association between alcohol consumption frequency and sociodemographic variables, lockdown period and Christmas period.
Results of zero-inflated Poisson regression, Optimise, Victoria, Australia, N = 9,431 surveys from 591 participants.
| Variable | Alcohol consumption | |
|---|---|---|
| Unadjusted Rate Ratio (95% CI†) | Adjusted Rate Ratio* (95% CI) | |
| Age group, years | ||
| 18–24 | Reference group | Reference group |
| 25–34 | 1.08 (0.87, 1.34) | 1.06 (0.81, 1.31) |
| 35–44 | 1.43 (1.07, 1.83) | 1.50 (1.17, 1.99) |
| 45–54 | 1.60 (1.30, 1.96) | 1.68 (1.36, 2.11) |
| 55–64 | 1.45 (1.17, 1.78) | 1.56 (1.24, 1.96) |
| 65+ | 1.97 (1.56, 2.44) | 2.19 (1.69, 2.79) |
| Gender | ||
| Woman | Reference group | Reference group |
| Man | 1.11 (0.95, 1.24) | 1.11 (0.96, 1.26) |
| Education | ||
| High school or lower | Reference group | Reference group |
| Tertiary education–TAFE/trade certificate | 1.09 (0.82, 1.37) | 0.94 (0.69, 1.20) |
| Tertiary education—undergraduate | 1.07 (0.86, 1.33) | 1.10 (0.91, 1.37) |
| Tertiary education—postgraduate | 1.14 (0.90, 1.45) | 1.01 (0.81, 1.23) |
| Working environment | ||
| Not working | Reference group | Reference group |
| Attend workplace | 0.83 (0.68, 1.00) | 1.01 (0.82, 1.25) |
| Work from home | 0.95 (0.81, 1.13) | 1.11 (0.91, 1.34) |
| Both workplace and working from home | 1.01 (0.82, 1.23) | 1.24(0.98, 1.54) |
| Place of residence | ||
| Region | Reference group | Reference group |
| Metro | 0.91 (0.77, 1.10) | 1.03 (0.84, 1.18) |
| Chronic condition | ||
| No | Reference group | Reference group |
| Yes | 1.21 (1.05, 1.36) | 1.04 (0.86, 1.17) |
| High-risk workers ** | ||
| No | Reference group | Reference group |
| Yes | 0.98 (0.82, 1.14) | 1.00 (0.82, 1.22) |
| Lockdown period *** | ||
| Non-lockdown period | Reference group | Reference group |
| Lockdown 2 | 0.95 (0.75, 1.15) | 0.93 (0.71, 1.13) |
| Lockdown 4 | 1.02 (0.96, 1.11) | 1.01 (0.94, 1.10) |
| Lockdown 5 | 1.01 (0.91, 1.11) | 1.00 (0.90, 1.08) |
| Lockdown 6 | 1.03 (0.97, 1.08) | 1.00 (0.95, 1.04) |
| Christmas period | ||
| Non-Christmas period | Reference group | Reference group |
| Christmas 2020 | 1.05 (0.96, 1.13) | 1.09 (1.01, 1.19) |
| Christmas 2021 | 1.23 (1.15, 1.31) | 1.21 (1.11, 1.31) |
†95% CIs were calculated for this model using a non-parametric bootstrap with 200 samples
*Adjusted for time
**High-risk workers: including aged care workers, hotel quarantine or COVID-19 border control workers, and healthcare workers
***Lockdown 2: 9th July 2020 – 27th October 2020
Lockdown 4: 28th May 2021 – 10th June 2021
Lockdown 5: 16th July 2021 – 27th July 2021
Lockdown 6: 5th August 2021 – 21st October 2021
Lockdown 3 (13th Feb 2021 – 17th Feb 2021) was classified as non-lockdown period in the analysis due to the short period of time