Morbid obesity, multiple long-term conditions, and health-related quality of life among Australian adults: Estimates from three waves of a longitudinal household survey

Keramat, Syed Afroz and Alam, Khorshed ORCID: and Keating, Byron and Ahinkorah, Bright Opoku and Aboagye, Richard Gyan and Seidu, Abdul-Aziz and Samad, Nandeeta and Saha, Monidipa and Gow, Jeff ORCID: and Biddle, Stuart J. H. ORCID: and Comans, Tracy (2022) Morbid obesity, multiple long-term conditions, and health-related quality of life among Australian adults: Estimates from three waves of a longitudinal household survey. Preventive Medicine Reports, 28:101823. pp. 1-10.

Text (Published Version)
Keramat (2022) Morbid obesity, multiple long-term conditions_2_PMR.pdf
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

Download (1MB) | Preview


This study aims to investigate the impact of morbid obesity and multiple long-term conditions (MLTCs) on health-related quality of life (HRQoL). Data for this study were sourced from three waves (waves 9, 13 and 17) of the Household, Income and Labour Dynamics in Australia (HILDA) survey. The paper analyses 37,887 person-year observations from 19,387 individuals during the period 2009-2017. The longitudinal random-effects Tobit model was fitted to examine the association between morbid obesity, MLTCs and HRQoL. This study found that morbid obesity and MLTCs were both negatively associated with HRQoL as measured through physical component summary (PCS), mental component summary (MCS), and the short-form six-dimension utility index (SF-6D) of the 36-item Short-Form Health Survey (SF-36). Morbidly obese scored lower points on the PCS (beta = -5.05, 95% CI: -5.73, -4.37), MCS (beta = -1.03, 95% CI: -1.84, -0.23), and in the SF-6D utility index (beta = -0.045, 95% CI: -0.054, -0.036) compared to their healthy weight counterparts. Similar findings were observed for individuals with MLTCs, with lower scores for the PCS (beta = -4.79, 95% CI: -5.20, -4.38), MCS (beta = -4.95, 95% CI: -5.43, -4.48), and SF-6D utility (beta = -0.071, 95% CI: -0.076, -0.066). Additionally, multiplicative interaction between morbid obesity and MLTCs was observed to modestly exacerbated the negative effect of morbid obesity on PCS scores (beta = -1.69, 95% CI: -2.74, -0.64). The interaction effect, on the other hand, significantly lessen the unfavourable effect of morbid obesity on the MCS score (beta = 1.34, 95% CI: 0.10, 2.58). The findings of this study will be useful for future cost-effectiveness analyses and measuring the burden of diseases since it provides information on the disutility associated with morbid obesity and MLTCs.

Statistics for USQ ePrint 49651
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Business, Education, Law and Arts - School of Business (18 Jan 2021 -)
Faculty/School / Institute/Centre: Current - Institute for Resilient Regions - Centre for Health Research (1 Apr 2020 -)
Date Deposited: 13 Jul 2022 04:17
Last Modified: 13 Jul 2022 04:17
Uncontrolled Keywords: Health-related quality of life; MCS; Morbid obesity; Multiple long-term conditions; PCS; SF-36; SF-6D
Fields of Research (2020): 42 HEALTH SCIENCES > 4202 Epidemiology > 420201 Behavioural epidemiology
42 HEALTH SCIENCES > 4206 Public health > 420699 Public health not elsewhere classified
Socio-Economic Objectives (2020): 20 HEALTH > 2004 Public health (excl. specific population health) > 200411 Overweight and obesity
Identification Number or DOI:

Actions (login required)

View Item Archive Repository Staff Only