Table 2.

The influence of holidays on log of total disease-related events by source (2008–2011)*

	Google News						Moreover
	Univariate			Multivariate			Univariate			Multivariate
International holidays (N=157)	% Change	95% CI	p	% Change	95% CI	p	% Change	95% CI	p	% Change	95% CI	p
International holidays (religious)
Christmas and New Years'	−27.4	(−41.3, −12.6)	<0.01	−27.4	(−41.4, −12.7)	<0.01	−19.7	(−38.7, −0.1)	0.08	−20.1	(−39.5, −0.6)	0.07
Easter	3.0	(−21.1, 26.5)	0.8				−7.7	(−42.3, 26.3)	0.66
Eid Al Adha	−15.6	(−49.6, 18.5)	0.4				−23.7	(−53.0, 5.8)	0.17
Eid Al Fitr	16.2	(−3.0, 36.3)	0.1				37.7	(8.7, 68.0)	<0.01	17.7	(−11.0, 46.5)	0.19
European holidays
Labor day (Europe)	−13.1	(−31.2, 5.5)	0.2				15.0	(−5.6, 35.8)	0.13
Europe day (May 9)	−9.5	(−33.0, 14.7)	0.5				−39.3	(−84.5, 5.8)	0.19
Armistice day	5.1	(−6.6, 16.9)	0.4				−52.8	(−113.4, 8.52)	0.26
US holidays
Martin Luther King day	37.7	(−34.8, 109.5)	0.2				12.7	(−10.2, 36.2)	0.25
Presidents day	13.9	(−8.4, 35.2)	0.2				19.7	(−15.4, 53.8)	0.24
Memorial day (US)	16.2	(−43.2, 74.9)	0.6				−36.2	(−62.2, −10.6)	0.03	−37.0	(−62.9, −10.9)	0.03
Independence day (July 4)	10.5	(−32.2, 52.4)	0.6				−17.3	(−48.8, 13.5)	0.32
Labor day (US)	12.7	(−27.9, 53.2)	0.5				64.9	(−19.3, 148.1)	0.06	51.7	(−36.0, 139.3)	0.16
Columbus day	−13.9	(−47.6, 20.3)	0.5				20.9	(−15.1, 56.8)	0.22
Veteran's day (US)	5.1	(−6.56, 16.9)	0.4				−52.8	(−113.3, 8.53)	0.26
Thanksgiving (US)	−33.6	(−47.0, −20.7)	<0.01	−34.9	(−47.7, −21.7)	<0.01	−41.1	(−67.9, −14.3)	0.02	−41.6	(−68.5, −14.5)	0.02
Other events:
US election (2008)	8.3	(−5.4, 22.8)	0.2				13.9	(−8.70, 37.29)	0.2
Adjusted R 2				0.05						0.05

^*Calculation of percent change based on formula from Halvorsen and Palmquist (38) applied to OLS coefficients; Delta Method, as described in Greene (39), was used in the computation of 95% confidene interval.

OLS, ordinary least square.

Bold values indicate instances where p<0.05.