Year: 2014
Type: review
Study design: Systematic Review
Abstract: Cardiovascular disease is the number one cause of death globally.The World health organization estimates that the death toll due to heart disease and stroke will be 23.3 million in 2030 (Mathers 2006).Estimated risk age of cardiovascular disease occurrence range from 25 years and above (WHO-NCD 2011).With increased surge in technology and modernization there has been increased need for a 24 hour working schedule to maintain, enhance productivity and efficiency in service delivery.Presently, occupational factors such as shift work have been associated to be a risk to cardiovascular disease.A work schedule done by any person that includes hours beyond daytime is called a shift worker.While a work schedule which frequently includes working hours of 2200 and 0600 are regarded as night work and the person in such activity is a night worker (Knutsson 1999).Shift work includes work done aside the regular working hours 0900-1700 (William 2008).International Labor Organization (ILO) defines shift work as a working time for workers in which they are made to succeed or relief one another at their place of work.This thesis is aimed to reanalyze the published shift work and cardiovascular event by Vyas 2012, by establishing the causal link between exposure to shift work and cardiovascular event through our formulated hypotheses.There are various conclusions concerning cardiovascular event in shift workers due to disagreement in the validity of studies used.We explored the various types of shift work, changes in shift schedule, intensity, and duration of exposure and cumulative effects of these types of exposure in shift workers.We used 33 studies comprising of 2,010,729 participants that were identified.The term 'exposure' of participants to shift work was defined and hypotheses were formulated.Participants were analyzed based on their exposure to shift work in the various formulated hypotheses.A meta-analysis of all formulated hypotheses was done using Review manager 5.2.The risk of shift work was noticed to start in less than 10 years of exposure categories.It was at its peak in 10-20 years of exposure (RR 1.22 (95% CI 1.08-1.37)).We found that rotating shift RR 1.24 (95% CI 1.21-1.27).Permanent night shift RR 1.08 (95% CI 0.98-1.26).The duration of shift work is a risk factor to cardiovascular event.As intensity in hour/week of exposure to shift work increases it poses a risk to cardiovascular event.The transiting of a day worker to shift work does not pose a risk to cardiovascular event.Rotating shift is a risk to cardiovascular event.Permanent night shift is a possible risk to cardiovascular event.
Author: Chukwudi P Nwankwo
Language: English
Subfield: Experimental and Cognitive Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: green
OpenAlex ID: W3095258924