A new study has found that over 15% of adults in the United States are affected by insomnia. This equates to approximately 37.9 million people. The research also revealed that women are 1.41 times more likely to suffer from insomnia compared to men. Additionally, it was discovered that individuals with higher education levels and those who were married had a lower prevalence of insomnia. The study highlights the significant impact of insomnia on a large portion of the adult population in the U.S.