Alcohol Drinking and Health in Ageing: A Global Scale Analysis of Older Individual Data through the Harmonised Dataset of ATHLOS

The effects of exceeding low-risk drinking thresholds on self-rated health and all-cause mortality in older adults: the Tromsø study 1994-2020

BACKGROUND

Based on findings of increasing alcohol consumption in older adults, it is important to clarify the health consequences. Using data from the Tromsø study, we aimed to investigate the relationship between different levels of alcohol consumption in old adulthood and self-rated health trajectories and all-cause mortality.

METHODS

This is an epidemiological study utilizing repeated measures from the Tromsø study cohort. It allows follow-up of participants from 1994 to 2020. A total of 24,590 observations of alcohol consumption were made in older adults aged 60-99 (53% women).

PRIMARY OUTCOME MEASURES

Self-rated health (SRH) and all-cause mortality. SRH was reported when attending the Tromsø study. Time of death was retrieved from the Norwegian Cause of Death Registry. The follow-up time extended from the age of study entry to the age of death or end of follow-up on November 25, 2020.

PREDICTOR

Average weekly alcohol consumption (non-drinker, < 100 g/week, ≥100 g/week). We fitted two-level logistic random effects models to examine how alcohol consumption was related to SRH, and Cox proportional hazards models to examine its relation to all-cause mortality. Both models were stratified by sex and adjusted for sociodemographic factors, pathology, biometrics, smoking and physical activity. In addition, all the confounders were examined for whether they moderate the relationship between alcohol and the health-related outcomes through interaction analyses.

RESULTS

We found that women who consumed ≥100 g/week had better SRH than those who consumed < 100 g/week; OR 1.85 (1.46-2.34). This pattern was not found in men OR 1.18 (0.99-1.42). We identified an equal mortality risk in both women and men who exceeded 100 g/week compared with those who consumed less than 100 g/week; HR 0.95 (0.73-1.22) and HR 0.89 (0.77-1.03), respectively.

CONCLUSIONS

There was no clear evidence of an independent negative effect on either self-rated health trajectories or all-cause mortality for exceeding an average of 100 g/week compared to lower drinking levels in this study with up to 25 years follow-up. However, some sex-specific risk factors in combination with the highest level of alcohol consumption led to adverse effects on self-rated health. In men it was the use of sleeping pills or tranquilisers and ≥ 20 years of smoking, in women it was physical illness and older age.

Applying Geriatric Principles to Hazardous Drinking in Older Adults

Older adults continue to drink as they age. Aging changes alcohol kinetics just as with any other drug. Older adults have increased sensitivity to acute alcohol intake that accounts for the increased risk of falls, traffic accidents, and other injury. The Annual Medicare Wellness Exam is an excellent opportunity to introduce screening for unsafe drinking along with accumulated risks and deficits of aging. Older adults have responded well to brief interventions for unhealthy drinking. In the presence of alcohol use disorder or serious comorbidity including psychiatric illness, referral to specialized multidisciplinary care can be lifesaving.