This statistic shows the percentage of adult U.S. respondents who often or always had difficulty sleeping due to select environmental factors as of 2014. It was found that an uncomfortable mattress was the most common environmental factor that disturbed sleep.
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National Sleep Foundation. (March 31, 2015). Percentage of U.S. adults who often or always had difficulty sleeping because of select environmental factors as of 2014 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 19, 2026, from /statistics/621416/american-difficulty-sleeping-environmental-factors/
National Sleep Foundation. "Percentage of U.S. adults who often or always had difficulty sleeping because of select environmental factors as of 2014." Chart. March 31, 2015. ÌÇÐÄÆƽâ°æ. Accessed July 19, 2026. /statistics/621416/american-difficulty-sleeping-environmental-factors/
National Sleep Foundation. (2015). Percentage of U.S. adults who often or always had difficulty sleeping because of select environmental factors as of 2014. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 19, 2026. /statistics/621416/american-difficulty-sleeping-environmental-factors/
National Sleep Foundation. "Percentage of U.S. Adults Who Often or Always Had Difficulty Sleeping Because of Select Environmental Factors as of 2014." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 31 Mar 2015, /statistics/621416/american-difficulty-sleeping-environmental-factors/
National Sleep Foundation, Percentage of U.S. adults who often or always had difficulty sleeping because of select environmental factors as of 2014 ÌÇÐÄÆƽâ°æ, /statistics/621416/american-difficulty-sleeping-environmental-factors/ (last visited July 19, 2026)
Percentage of U.S. adults who often or always had difficulty sleeping because of select environmental factors as of 2014 [Graph], National Sleep Foundation, March 31, 2015. [Online]. Available: /statistics/621416/american-difficulty-sleeping-environmental-factors/
