Shift work statistics

Group 2A — probably carcinogenic to humans

Applies to night shift work (defined with reference to typical sleeping hours). Based on limited evidence in humans, sufficient evidence in animals, and strong mechanistic evidence in animals (IARC Vol. 124).

30.7% reported poor sleep quality

NIOSH summary of Calvert et al. (Occupational & Environmental Medicine, 2017); nationally representative U.S. working adult sample. “Poor sleep quality” per study definitions in the paper.

18.5% (night shift) vs 8.4% (daytime)

Same NHANES-based study population and NIOSH science bulletin summary as above.

Source needed — pending verified figure

Replace with a single prevalence estimate from a named national survey or meta-analysis, cited to PubMed/NIH or a peer-reviewed journal. Sleep Foundation’s disorder hub is linked as background reading only.

22.3% vs 16.2%

From the same NIOSH science bulletin summarising Calvert et al. (NHANES).

42.1% vs 31.0%

Rotating shift workers vs regular daytime workers in the NHANES-based analysis summarised by NIOSH.

Source needed — pending verified figure

Replace with one attributable estimate (e.g. from a regulator report or peer-reviewed occupational injury study) with clear scope (industry, country, outcome definition).

Fatigue should be managed like other workplace hazards

HSE describes fatigue as reduced mental and/or physical performance linked to sleep loss and body-clock disruption, with employer duties to assess and control risk (not a single numeric “fatigue rate”).

Source needed — pending verified figure

Add one citable national or multi-site estimate with numerator/denominator definitions (e.g. HSE enforcement data, EU-OSHA synthesis, or peer-reviewed cohort).

Source needed — extract verified prevalence contrast from Calvert et al. (2017)

The NHANES sleep paper defines symptomatic depression (PHQ-9–based threshold) and presents contrasts by shift type; quote a single audited figure from the BMJ/OEM paper rather than paraphrasing here.

Use WHO materials for workplace mental health framing

No single shift-work mental-health percentage is listed here; link is for authoritative context when you expand this section.

Obese workers had higher prevalence of short sleep and poor sleep quality vs normal-weight/underweight workers

Association reported in the NIOSH science bulletin summary of the NHANES analysis (not a causal claim).

Source needed — pending verified figure

Replace with one pooled hazard or odds ratio from a named systematic review / meta-analysis (e.g. PubMed-indexed), including years covered and shift definition.

Evaluation addresses night shift work (including transmeridian travel) as circadian rhythm disruption

Useful when explaining why clinical night rosters sit in the same hazard-evaluation frame as other night industries.

Source needed — pending verified figure

Replace with one statistic from a national workforce survey, union report, or peer-reviewed hospital cohort, with field dates and role definitions (nurses vs all clinical).

Regulator-hosted guidance covers shift timing, recovery between shifts, and practical sleep tips

Link points to HSE shift-worker hints; add verbatim extracts and HSG256 paragraph references when you need quotable roster rules.

See NIH/PMC open-access review for mechanisms (clock genes, melatonin, sleep debt)

Use for background and further reading; not a substitute for workplace-specific risk assessment.

Source needed — pending verified figure

Replace with a numeric recommendation from HSE HSG256, joint consensus guidance, or a peer-reviewed simulation study — cite paragraph or table.