Research Article

The “Weekday Effect”: A Decrease in Occupational Accidents from Monday to Friday—An Extension of the “Monday Effect”

Table 5

Accidents by day of the week and consequences. Full-time workers (Spain), 2011-2018.

Number of accidentsPercentage compared to Monday
MonTueWedThuFriTotalMonTueWedThuFri

Severity

value < 0.001
Light687,633589,082565,695520,917484,6292,847,956100%85.7%82.3%75.8%70.5%
Serious4,8314,5834,5754,4714,14722,607100%94.9%94.7%92.5%85.8%
Fatal7576536576266163,309100%86.3%86.8%82.7%81.4%

Injury type

value < 0.001
Other and unknown injuries14,45812,24711,69210,8479,78459,028100%84.7%80.9%75.0%67.7%
Superficial–wounds and injuries219,053200,062194,678179,522160,510953,825100%91.3%88.9%82.0%73.3%
Bone fractures43,93739,68539,18337,81338,258198,876100%90.3%89.2%86.1%87.1%
Dislocations, sprains, and strains353,371287,726272,557248,302234,4241,396,380100%81.4%77.1%70.3%66.3%
Traumatic amputations, loss of body parts1,5101,4911,5501,5031,3837,437100%98.7%102.6%99.5%91.6%
Shock and internal injuries38,88032,19830,52928,27026,395156,272100%82.8%78.5%72.7%67.9%
Burns, scalds, and frostbite8,2688,2408,2917,9997,85640,654100%99.7%100.3%96.7%95.0%
Poisonings and infections1,1481,0351,1071,0151,0375,342100%90.2%96.4%88.4%90.3%
Drowning and suffocation4063914033942721,866100%96.3%99.3%97.0%67.0%
Effects of noise, vibration, and pressure8367176946235523,422100%85.8%83.0%74.5%66.0%
Effects of extreme temp., light, radiation3073573162241761,380100%116.3%102.9%73.0%57.3%
Psychological damages, traumatic shocks2,3902,2362,2002,0291,91310,768100%93.6%92.1%84.9%80.0%
Multiple injuries6,8806,4486,3315,9975,41531,071100%93.7%92.0%87.2%78.7%
Heart attacks, strokes, and nontraumatic1,7771,4851,3961,4761,4177,551100%83.6%78.6%83.1%79.7%

Injured body part

value < 0.001
Not specified1,1571,0441,0339828985,114100%90.2%89.3%84.9%77.6%
Head38,31739,62938,92732,91526,945176,733100%103.4%101.6%85.9%70.3%
Neck27,27123,63122,88421,06619,261114,113100%86.7%83.9%77.2%70.6%
Back146,764108,17198,93188,35482,628524,848100%73.7%67.4%60.2%56.3%
Trunk30,57825,22424,14723,10723,549126,605100%82.5%79.0%75.6%77.0%
Upper limbs238,145211,406205,680192,932178,9341,027,097100%88.8%86.4%81.0%75.1%
Lower limbs190,990166,281160,584148,838141,284807,977100%87.1%84.1%77.9%74.0%
Multiple parts18,19517,33117,21616,27314,53483,549100%95.3%94.6%89.4%79.9%
Others1,8041,6011,5251,5471,3597,836100%88.7%84.5%85.8%75.3%

Statistically not significant difference, in number (percentage) of accidents, with the previous day.