Electricity loadshedding is associated with poorer self-reported sleep, studying habits, and grades in South African university students
In a cross-sectional survey of 1124 South African university students during 2023, 73% reported that loadshedding affected their sleep, with 80% of those reporting worse sleep. Access to alternative power was associated with nearly 60% reduced odds of worse sleep (OR=0.43, 95% CI: 0.32-0.56). Students with worse sleep more often reported a drop in grades (59% vs. 38%, P=0.015).
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Electricity loadshedding is associated with poorer self-reported sleep, studying habits, and grades in South African university students The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Electricity loadshedding is associated with poorer self-reported sleep, studying habits, and grades in South African university students
This conclusion is most relevant to: South African university students (mean age 22, 72% female) at the University of the Witwatersrand.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Hello darkness, my old friend: Electricity loadshedding effects on sleep and studying habits in South African university students. (Sleep health, 2026) —
How It Works
The proposed biological pathway:
- ▸Loadshedding removes control over lighting and room temperature
- ▸Backup generator use increases noise pollution
- ▸These disruptions increase sleep fragmentation and onset latency
- ▸Result: poorer sleep quality and academic performance
Who Might Benefit
Evidence fit by population:
- ▸South African university students (mean age 22, 72% female) at the University of the Witwatersrand
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Cross-sectional design prevents causal inference
- ▸Self-reported outcomes may be subject to recall bias
- ▸Low response rate (3% of university population) may limit generalizability
- ▸No objective sleep measures (e.g., actigraphy) were used
Frequently Asked Questions
How did loadshedding affect sleep in South African university students?▼
73% of students reported that loadshedding affected their sleep, with 80% of those reporting worse sleep. The most common disruptions were increased sleep fragmentation (51%) and longer sleep onset latency (32%).
Did access to alternative power reduce the negative impact of loadshedding on sleep?▼
Yes, students with access to alternative power (40% of the sample) had nearly 60% reduced odds of reporting worse sleep (OR=0.43, 95% CI: 0.32-0.56), after adjusting for age, sex, degree level, accommodation, ancestry, and faculty.
Was there a link between worse sleep and academic performance?▼
Yes, students who reported worse sleep due to loadshedding were more likely to report a drop in grades (59%) compared to those with no change (38%), with a statistically significant difference (P=0.015).
What are the potential long-term health implications of loadshedding-related sleep disruption?▼
The authors suggest that loadshedding-related sleep disruption may be linked to increased risk for mental and physical health problems, although this was not directly measured in the study.
References
- 1.Davimes JG, Scheuermaier K. “Hello darkness, my old friend: Electricity loadshedding effects on sleep and studying habits in South African university students..” Sleep health, 2026. PMID: 42632767 DOI: 10.1016/j.sleh.2026.07.008