Among 9,243 participants, 15.0% were night/shift workers, who showed lower motivation for lifestyle change compared to daytime workers.
Night/shift workers were younger and had a lower proportion of men compared to daytime workers.
26.9% of daytime workers were in the for lifestyle, compared to 22.2% of night/shift workers.
Night/shift workers were less likely to demonstrate action and maintenance stages of change, with an adjusted odds ratio of 0.85.
In participants working long hours (≥10 hours/day), the association between night/shift work and lower motivation for change was stronger, with an adjusted odds ratio of 0.65.
A significant interaction was found between long working hours and night/shift work regarding motivation for lifestyle change.
Simplified
OBJECTIVE: To investigate the association between work schedules and motivation for behavioural change of lifestyle, based on the (TTM) in workers with overweight or obesity.
DESIGN: A cross-sectional observational study.
SETTING: A healthcare examination centre in Japan.
PARTICIPANTS: Between April 2014 and March 2016, we recruited 9243 participants who underwent healthcare examination and met the inclusion criteria, namely, age 20-65 years, body mass index (BMI) ≥25 kg/mand full-time workers. 2
EXPOSURE: Night and shift (night/shift) workers were compared with daytime workers in terms of motivation for behavioural change.
PRIMARY AND SECONDARY OUTCOME MEASURES: The primary outcome was (SOC) for lifestyle in TTM. In a subgroup analysis, we investigated interactions between characteristics, including age, sex, BMI, current smoking, alcohol habits, hours of sleep and working hours.
RESULTS: Overall, 1390 participants (15.0%) were night/shift workers; night/shift workers were younger (median age (IQR): 46 (40-54) vs 43 (37-52) years) and the proportion of men was lesser (75.4 vs 60.9%) compared with daytime workers. The numbers of daytime and night/shift workers in the action and maintenance SOC were 2113 (26.9%) and 309 (22.2%), respectively. Compared with daytime workers, night/shift workers were less likely to demonstrate action and maintenance SOC (adjusted OR (AOR): 0.85, 95% CI: 0.74 to 0.98). In a subgroup analysis that included only those with long working hours (≥10 hours/day), results revealed a strong inverse association between night/shift work and action and maintenance SOC (AOR: 0.65, 95% CI: 0.48 to 0.86). A significant interaction was observed between long working hours and night/shift work (P for interaction=0.04).
CONCLUSIONS: In workers with overweight or obesity, a night/shift work schedule was associated with a lower motivation for behavioural change in lifestyle, and the association was strengthened in those with long working hours.
Key numbers
0.85
Lower Motivation for Change
Adjusted odds ratio for action or maintenance
0.65
Stronger Association with Long Hours
Adjusted odds ratio for long working hours subgroup
1390 of 9243
Prevalence of Night/Shift Workers
Total participants included in the study
Full Text
We can’t show the full text here under this license.
