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Sleep duration and fatigue in construction workers: A preliminary study Cover

Figures & Tables

Performance results in the parameters of the PC-PVT according to Educational Level

ParametersLow (<8 years)N = 44Medium (8–12 years)N = 85High (>12 years)N = 25P-value

Average (±SD)Average (±SD)Average (±SD)
Mean RT327.99 (74.67)301.14 (77.92)277.50 (26.01)0.020
Fastest10%236.44 (37.73)217.98 (21.24)208.93 (18.67)0.000
Slowest10%599.10 (284.63)505.42 (229.81)431.83 (104.96)0.010

PC-PVT performance results according to self-reported sleep hours

Parameters<5 hN = 525–7 hN = 847–9 hN = 18P-value

Average (±SD)Average (±SD)Average (±SD)
Mean RT314.63 (103.57)294.23 (35.42)327.19 (89.03)0.110
Fastest10%222.32 (29.31)217.44 (19.71)240.56 (47.43)0.010
Slowest10%544.40 (305.96)499.33 (164.38)548.02 (304.27)0.490

Sociodemographic and health characteristics of the sample

N154
Men100%
Age
Average44.17 (SD: 12.72)
<3545 (29.2%)
35–4529 (18.8%)
>4580 (51.9%)
Schooling
Average years10.47 (SD: 3.31)
Nationality
Chilean82.50%
Peruvian8.4%
Haitian3.90%
Colombian3.2%
Other2.0%
Marital status
Married35.7%
Single37.0%
Cohabiting17.5%
Other9.6%
Perception of health
Excellent – very good22.7%
Good51.9%
Regular – bad25.4%
Satisfaction with life
Very satisfied-satisfied80.5%
Little satisfied14.9%
Dissatisfied4.6%
Exercise
Not done50.6%
≥3 times a week18.2%
Comorbidity
Arterial hypertension13.0%
Diabetes5.8%
Acute myocardial infarction1.3%
Locomotor system3.2%
Respiratory0.6%
Neurological0.6%
Mental health0.6%
Obesity (BMI > 30)32.7% (range 30.05–40.82)
Overweight (BMI 25–29.9)27.5% (range 25.12–29.83)
Moderate CVR (waist circumference >94)28.6% (range 95–101.5)
High CVR (waist circumference >102)36.4% (range 102–126)

Relationship between hours of sleep and declared fatigue

FatigueNMeanSD
Hours of sleepYes695.721.24t = 1.618
No856.041.19P = 0.108

Sleep quality according to Pittsburgh

PittsburghFrequencyPercentageValid percentageAccumulated percentage
Valid<53623.423.423.4
5–75837.737.761.0
8–145837.737.798.7
>1521.31.3100.0
Total154100.0100.0

Features related to sleep events

N154
Sleep hours
<7 h74.0%
7–8 h24.7%
>8 h1.3%
Events during sleep
Snore56.5%
Drown40.3%
Daytime conditions
Fatigue44.8%
Sleepiness Epworth Scale
Lower or null (1–6 points)39.6%
Moderate sleepiness (7–8 points)14.9%
Excessive sleepiness (9–24 points)42.9%

Performance results in the parameters of the PC-PVT according to Civil Status

ParametersSingleN = 57CohabitingN = 27MarriedN = 55SeparatedN = 13P-value

Average (±SD)Average (±SD)Average (±SD)Average (±SD)
Mean RT299.23 (56.86)284.09 (38.04)326.01 (99.86)283.72 (23.28)0.040
Fastest10%218.46 (29.04)215.34 (22.70)230.03 (31.21)213.87 (13.78)0.050
Slowest10%491.06 (200.88)449.30 (131.03)604.33 (310.17)443.38 (89.12)0.010

Comparative results of performance parameters in PC-PVT according to Age Group (ANOVA)

Parameters20–29 yearsN = 2930–39 yearsN = 2440–49 yearsN = 4150–59 yearsN = 4060–75 yearsN = 18P-value

Average (±SD)Average (±SD)Average (±SD)Average (±SD)Average (±SD)
Mean RT274.54 (26.21)290.32 (35.32)320.72 (119.01)305.41 (37.76)341.88 (63.24)0.010
Fastest10%208.86 (16.73)212.27 (17.09)226.93 (38.56)223.04 (22.60)241.94 (27.03)0.000
Slowest10%402.70 (52.26)488.44 (171.65)554.51 (328.58)529.89 (178.05)669.57 (290.51)0.000

Results of drowsiness, sleep quality and reaction (fatigue) according to type of instrument

TestNMinimumMaximumAverageSD
PITTSBURGH1541.0019.007.013.19
EPWORTH1541.0021.008.204.54
PVTMEAN154218.94921.23304.9772.74
PVTMEDIAN154205.00640.00279.9148.67
DOI: https://doi.org/10.2478/otmcj-2021-0029 | Journal eISSN: 1847-6228 | Journal ISSN: 1847-5450
Language: English
Page range: 2496 - 2504
Submitted on: Dec 26, 2020
Accepted on: Feb 28, 2021
Published on: Oct 9, 2021
Published by: University of Zagreb
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2021 Ximena Ferrada, Silvia Barrios, Patricia Masalan, Solange Campos-Romero, Juan Carrillo, Yerko Molina, published by University of Zagreb
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.