Nighttime assaults: using a national emergency department monitoring system to predict occurrence, target prevention and plan services

Bellis, Mark A; Leckenby, Nicola; Hughes, Karen; Luke, Chris; Wyke, Sacha; Quigg, Zara

doi:10.1186/1471-2458-12-746

Table 2 Variations with calendar event in average numbers ^$ of per evening assault presentations across English emergency department services

From: Nighttime assaults: using a national emergency department monitoring system to predict occurrence, target prevention and plan services

Calendar events			All attendances				Males				Females
				95% CI				95% CI				95% CI
		Days	Mean	Low	Up	Sig	Mean	Low	Up	Sig	Mean	Low	Up	Sig
All days		1095	301.4	292.1	310.8		227.3	219.7	234.9		72.6	70.8	74.4
Holidays	No holiday	1072	301.7	292.1	311.2	0.946	227.7	219.9	235.4	0.869	72.5	70.7	74.3	0.940
	Bank holiday	18	287.7	236.6	338.8		209.1	168.0	250.2		77.0	66.8	87.2
	Christmas	3	264.0	154.8	373.2		189.7	95.8	283.6		73.3	58.2	88.5
	New Year	3	278.0	161.6	394.4		205.0	88.8	321.2		72.7	66.4	78.9
Holiday	No holiday	1071	296.0	287.0	305.0	<0.001	222.9	215.6	230.2	<0.001	71.6	69.9	73.4	<0.001
Eves	Bank holiday	18	447.1	390.0	504.1		340.9	293.5	388.4		102.2	92.2	112.3
	Christmas	3	485.3	422.2	548.5		399.7	323.2	476.0		83.3	54.5	112.1
	New Year	3	1196.3	975.0	1417.7		956.7	765.1	1148.2		231.0	185.4	276.6
Dayⁱ	Sunday	142	230.2	221.8	238.6	<0.001	166.2	159.6	172.9	<0.001	62.9	60.7	65.2	<0.001
	Monday	156	198.6	193.2	204.0		143.6	139.5	147.7		54.2	52.3	56.0
	Tuesday	157	186.1	181.0	191.3		132.9	128.9	136.8		52.5	50.8	54.2
	Wednesday	155	197.8	190.7	204.8		143.6	137.7	149.5		53.4	51.6	55.2
	Thursday	151	227.2	221.2	233.2		170.1	165.3	174.9		56.0	54.3	57.8
	Friday	154	503.1	491.8	514.3		393.2	383.7	402.6		107.1	104.5	109.6
	Saturday	156	523.1	509.1	537.0		406.0	395.0	417.0		114.3	111.0	117.6
Calendar	Jan	92	246.0	219.7	272.3	<0.001	184.9	163.5	206.4	0.003	59.9	54.9	64.9	<0.001
Monthⁱ	Feb	84	280.8	249.0	312.6		212.3	186.6	238.1		66.9	60.8	73.0
	Mar	93	267.1	240.2	294.0		200.8	178.8	222.8		65.6	60.5	70.7
	Apr	86	309.7	277.2	342.2		231.9	205.8	258.1		75.5	69.1	81.8
	May	87	334.0	300.1	367.8		251.3	223.4	279.1		80.3	74.2	86.3
	Jun	90	321.2	287.5	354.9		238.8	211.7	266.0		80.5	74.0	87.0
	Jul	93	319.2	287.8	350.6		238.5	213.1	263.9		79.3	73.1	85.5
	Aug	90	322.7	293.2	352.3		241.2	217.0	265.4		80.2	74.6	85.8
	Sep	90	297.5	266.0	329.1		224.8	199.0	250.7		71.4	65.6	77.3
	Oct	93	312.0	276.4	347.6		238.5	209.5	267.4		72.4	65.6	79.2
	Nov	90	274.0	244.2	303.8		205.8	181.6	230.0		67.1	61.3	72.9
	Dec	83	266.7	236.6	296.7		205.7	180.6	230.8		59.6	54.4	64.9
Change of	Neither	935	296.6	287.0	306.1	0.205	223.6	215.8	231.3	0.189	71.5	69.7	73.8	0.257
month^i,ii	First 2 days	69	269.7	237.9	301.6		200.1	174.5	225.7		68.4	61.9	74.9
	Last 2 days	67	314.7	271.7	357.8		236.9	201.8	272.0		76.4	68.4	84.5
Change of	Neither	599	294.2	282.3	306.1	0.288	222.0	212.3	231.7	0.295	70.8	68.5	73.0	0.203
month^i,ii	First week	246	288.1	269.9	306.2		215.7	201.2	230.3		70.9	67.2	74.6
	Last week	226	309.1	288.2	329.1		233.0	216.0	250.1		74.7	70.7	78.6
Yearⁱⁱⁱ	2008/09	366	285.5	270.1	300.8	0.060	215.0	202.5	227.5	0.078	69.8	66.9	72.8	0.067
	2009/10	365	309.1	292.1	326.0		233.1	219.4	246.9		73.0	69.8	76.2
	2010/11	364	309.8	293.5	326.2		233.9	220.6	247.2		74.9	71.8	78.1

^$National emergency department data are not complete for England and therefore figures do not represent national totals - see Methods. Statistics use analysis of variance. ⁱVariables exclude banks holiday and Christmas eves. ⁱⁱChange of month variables mark the first and last two days and first and last week in each month. ⁱⁱⁱYears run 31^st March to 30^th March to account for time-shifted data.

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