Perceived environmental stressors were significantly and negatively associated with both sleep quality and ICU experience, and poor sleep quality was itself a significant negative predictor of ICU experience, demonstrating both direct and indirect pathways through which environmental stressors contribute to negative critical care outcomes.
Key Findings
Results
Perceived environmental stressors were significantly and negatively associated with sleep quality in ICU patients.
Standardized regression coefficient β = -0.335, p < 0.001
Finding derived from multiple linear regression analysis
Study included 156 ICU patients recruited via convenience sampling
Data collected between February and August 2025 in a tertiary hospital in southeastern Türkiye
Sleep quality measured using the Richard-Campbell Sleep Questionnaire (RCSQ)
Results
Perceived environmental stressors were significantly and negatively associated with ICU patient experience.
Standardized regression coefficient β = -0.603, p < 0.001
This association was stronger than the association between environmental stressors and sleep quality (β = -0.335)
ICU experience measured using the Intensive Care Experience Scale (ICES)
Environmental stressors measured using the Intensive Care Unit Environmental Stressors Scale (ICUESS)
Results
Poor sleep quality was a significant negative predictor of ICU patient experience.
Standardized regression coefficient β = -0.196, p = 0.007
This finding indicates an indirect pathway through which environmental stressors affect ICU experience via sleep disturbance
Both direct and indirect (via sleep) pathways contributed to negative ICU experiences
Finding derived from multiple linear regression analysis
Results
Demographic and clinical characteristics were not significant predictors of either sleep quality or ICU experience.
Neither demographic nor clinical variables reached statistical significance in either regression model
This suggests environmental factors, rather than patient characteristics, are the primary drivers of sleep quality and ICU experience in this sample
Study was cross-sectional and correlational in design
Sample size was 156 patients
Methods
The study examined sleep quality and ICU experience simultaneously within the same regression model framework, addressing a gap in existing literature.
Authors noted that 'limited studies have examined both outcomes simultaneously in the same model'
Cross-sectional, correlational design was used
Data collection occurred over a six-month period (February to August 2025) in ICUs of a single tertiary hospital
Three validated instruments were used: ICUESS, RCSQ, and ICES
What This Means
This research suggests that the hospital environment in intensive care units (ICUs) — particularly factors like noise, bright lighting, and lack of privacy — has a measurable negative impact on how well patients sleep and how positively they experience their ICU stay. In a study of 156 ICU patients in Türkiye, researchers found that patients who perceived more environmental stressors reported worse sleep quality and worse overall ICU experiences. Notably, the link between environmental stressors and poor ICU experience was quite strong.
The study also found that poor sleep itself independently predicted a worse ICU experience, meaning environmental stressors affect patients through two pathways: directly (by making the ICU stay feel worse) and indirectly (by disrupting sleep, which then further worsens the experience). Interestingly, patient demographics and clinical characteristics — such as age or medical condition — did not significantly predict sleep quality or ICU experience, suggesting the environment itself plays a more central role than individual patient factors.
This research suggests that nursing interventions aimed at reducing environmental stressors — such as implementing quiet hours, dimming lights at night, or using ear plugs and eye masks — could meaningfully improve both sleep and the overall patient experience in the ICU. The findings also support broader efforts to redesign ICU environments and develop nurse-led strategies focused on patient comfort and wellbeing during critical illness.
Aksoy M, Büyükbayram Genç Z, Güner M. (2026). The Impact of Environmental Stressors on Sleep Quality and Patient Experience in the Intensive Care Unit.. Nursing in critical care. https://doi.org/10.1111/nicc.70315