South Africa needs more sleep
Stellenbosch study shows sleep-deprived employees cost country billions
South Africans desperately need more sleep.
That’s according to a Stellenbosch study showing that sleep-deprived employees are at higher risk of life-threatening chronic illness and disability, more likely to cause workplace accidents, less productive and more absent.
It all adds up to an economic liability in the billions.
The cost to just one medical aid scheme of treating the life-threatening diseases linked to sleeping less than the recommended eight hours a night is estimated at R22-bn annually, according to a recent study conducted by Charles King, an MBA student at the University of Stellenbosch Business School (USB).
King set out to determine the expected savings in healthcare costs if the group in his study could develop healthy sleeping habits in a world that expects employees to be “always-on”.
He gathered data from 658 men and women between 25 and 40 working at a national financial services group, tracking their sleep over three months.
“Lack of sleep is not only related to workplace issues such as absenteeism, lack of productivity, poor work performance, and accidents – which have a direct cost impact on a business – but insufficient sleep has been directly linked with seven of the 15 leading causes of death,” King said.
“The research looked at the indirect costs of lack of sleep, particularly the cost to medical schemes of treating illnesses where inadequate sleep is a major risk factor. We asked what the potential savings would be to a medical scheme if individuals just got enough sleep.”
It is widely accepted that seven to nine hours sleep a night are optimal for wellness, productivity and lowering the risk of disease, but King said two-thirds (64%) of the people whose sleeping habits he tracked slept for less than seven hours a night, with men more likely to be sleep-deprived.
And his results were frightening with less sleep increasing the likelihood of developing several illnesses such as: Major depression by 22%
Coronary artery disease by 73%
Type 2 diabetes by up to 18%
Risk of developing colorectal cancer by 50% Those who don’t get enough sleep, he said, are subject to a “double jeopardy” scenario – lack of sleep is a contributing factor to obesity, and both are individually linked to increased risk of cardiovascular disease, depression, cancers and diabetes.
Participants in King’s research into sleeping habits who slept for less than six hours nightly had a body-mass index (BMI) 12% greater than those who slept for the recommended seven to nine hours, while those who slept for less than five hours a night had some of the highest BMI measurements.
In line with previous research done around the world, he found that the shorter the sleep duration, the higher the BMI measurement, while BMI lowered as individuals got sufficient sleep.
“On its own, obesity doesn’t have a direct financial implication but leads to many other health problems or aggravates them, for example by preventing physical exercise, which will in turn increases the risk of coronary disease or of a low self-image, which may then fuel major depression,” he said.
The Stellenbosch research highlighted how sleep problems have become one of the leading causes of physical and mental health illnesses, due to expectations of being always available, shift work and longer working hours, 24/7 availability of entertainment and addiction to technology such as mobile phones.
Even one night of less than six hours sleep is equivalent to two totally sleepless nights in its impact on cognitive performance – impairing memory and concentration, and making risky decision-making more likely – and the risk factors for disease increase exponentially as sleep time decreases below the seven-hour mark.
Making the sleepless scenario worse, people with habitually poor sleeping patterns also tend to have unhealthy lifestyle habits like drinking alcohol, smoking and lack of exercise – combining these with insufficient sleep further increases the risk of developing chronic diseases.
“Medical schemes carry the burden of these diseases, directly and indirectly. The costs need to be established, to identify the risk for the schemes if members do not adhere to healthy sleeping patterns and other lifestyle choices,” King said.
He said there was a need for more research and analysis of the macro-economic and financial impacts of insufficient sleep on individuals, society and medical insurers, as well as understanding and measuring the impact on people reliant on the public health sector.
This would assist in raising awareness of the importance of healthy sleep patterns.