Researchers from the University of Warwick in the UK found that almost 17% of those surveyed in Tanzania, Ghana, Kenya, South Africa, Bangladesh, India, Indonesia and Vietnam suffer from sleep problems such as insomnia.
That's compared to a Western prevalence rate of 20%.
Although the overall rate of sleeplessness in the developing countries mentioned above was almost 17%, there were huge differences between countries.
For example, in Bangladesh close to 44% of women reported sleep problems (twice the rate seen in developed countries). Vietnam saw an average prevalence rate of 33%.
India and Indonesia sit at the opposite end of the scale, with an average prevalence rate of less than 5%.
Interestingly, 31% of women and 27% of men in South Africa (which perhaps is the most 'Western' of the countries surveyed) reported sleep problems. Higher than most of the countries surveyed, but still behind Bangladesh.
This just goes to show that insomnia isn't solely a Western problem. It's universal - and that means prevalence rates are likely to continue increasing over time.