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

Table 4

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

		Number of accidents						Percentage compared to Monday
		Mon	Tue	Wed	Thu	Fri	Total	Mon	Tue	Wed	Thu	Fri
Day hour; value < 0.001	Morning (8 to 14)	421,036	344,945	330,022	303,384	279,164	1,678,551	100%	81.9%	78.4%	72.1%	66.3%
	Lunch (14 to 16)	55,544	50,584	49,286	45,350	43,824	244,588	100%	91.1%	88.7%	81.6%	78.9%
	Afternoon (16 to 19)	101,537	94,097	91,309	82,815	75,696	445,454	100%	92.7%	89.9%	81.6%	74.6%
	Other (19 to 8)	115,104	104,692	100,310	94,465	90,708	505,279	100%	91.0%	87.1%	82.1%	78.8%
Work hour; value < 0.001	First 4 hours of work	464,387	378,133	361,524	333,680	302,783	1,840,507	100%	81.4%	77.8%	71.9%	65.2%
	More than 4 hours	228,834	216,185	209,403	192,334	186,609	1,033,365	100%	94.5%	91.5%	84.0%	81.5%
Work hour; value < 0.001	1	117,679	84,035	80,116	74,482	65,407	421,719	100%	71.4%	68.1%	63.3%	55.6%
	2	139,024	111,643	105,050	96,582	86,109	538,408	100%	80.3%	75.6%	69.5%	61.9%
	3	111,633	95,841	91,869	84,131	77,226	460,700	100%	85.9%	82.3%	75.4%	69.2%
	4	96,051	86,614	84,489	78,485	74,041	419,680	100%	90.2%	88.0%	81.7%	77.1%
	5	67,051	62,671	60,910	56,935	54,914	302,481	100%	93.5%	90.8%	84.9%	81.9%
	6	61,896	59,429	57,457	52,715	50,433	281,930	100%	96.0%	92.8%	85.2%	81.5%
	7	51,577	49,659	48,684	43,399	42,621	235,940	100%	96.3%	94.4%	84.1%	82.6%
	8	30,816	29,241	27,717	25,527	25,666	138,967	100%	94.9%	89.9%	82.8%	83.3%
	More than 8	17,494	15,185	14,635	13,758	12,975	74,047	100%	86.8%	83.7%	78.6%	74.2%

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