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Table 6 Adherence to interventions in index patients and household contacts by intervention group and study season

From: The role of facemasks and hand hygiene in the prevention of influenza transmission in households: results from a cluster randomised trial; Berlin, Germany, 2009-2011

Variables Index Contacts
  Mask Group Mask & Hygiene
Group 		Mask Group Mask & Hygiene
Group
  2009/
2010 		2010/
2011 		2009/
2010 		2010/
2011 		2009/
2010 		2010/
2011 		2009/
2010 		2010/
2011
Hygiene variables         
Number of hand disinfections per day - mean ± SD NA 7.4
(6.3-8.5)* 		4.1
(3.3-4.8)* 		NA 8.8
(7.9-9.6) 		7.5
(6.5-8.5)
Adherent to intensified hand hygiene during each of the five days after implementation of the intervention (adherence def. 2) - n/n (%)** NA 8/17
(47)* 		1/9
(9)* 		NA 15/39
(38) 		13/28
(46)
Hand disinfection/-washing after coming home*** - n/n (%) 7/9
(78) 		7/14
(50) 		10/16
(63) 		6/11
(55) 		11/23#
(64) 		21/30#
(70) 		28/32#
(88) 		20/22#
(91)
Hand disinfection/-washing after touching contaminated objects*** - n/n (%) 1/11
(9) 		0 3/17
(18) 		1/11
(9) 		11/23#
(48) 		16/30#
(53) 		28/32#
(88) 		16/22#
(73)
Hand disinfection/-washing before eating*** - n/n (%) 8/11
(73) 		6/15
(40) 		13/17
(77) 		6/11
(55) 		23/23#
(100) 		27/30#
(90) 		28/32#
(88) 		15/22#
(68)
Hand disinfection/-washing after coughing/sneezing*** - n/n (%) 5/11
(46) 		0 9/17
(53) 		3/11
(27) 		17/30#
(57) 		16/38#
(42) 		22/38#
(58) 		8/28#
(29)
Mask variables         
Adherent to facemask use during each of the five days after full implementation of the intervention (adherence definition 2) - n/n (%)## 6/11
(55) 		7/15
(47) 		7/17
(41) 		2/11
(18) 		17/31
(55) 		18/39
(46) 		17/38
(45) 		13/28
(46)
Wore facemask when being in the same room with index/contact*** - n/n (%) 8/10
(80) 		8/15
(53) 		13/16
(81) 		6/11
(55) 		23/31
(74) 		32/37
(87) 		26/38
(68) 		24/28
(86)
Wore facemask when being in close contact to index/contact*** - n/n (%) 7/10
(70) 		9/15
(60) 		13/16
(81) 		5/11
(46) 		24/31
(77) 		34/38
(90) 		27/38
(71) 		21/28
(75)
Wore facemask when providing care to index/being provided for by household contact*** - n/n(%) 6/9
(67) 		4/5
(80) 		6/12
(50) 		3/7
(43) 		10/16
(63) 		13/16
(81) 		12/21
(57) 		12/13
(92)
  1. NA not applicable, HD hand disinfection, SD standard deviation. * p < 0.05 between seasons. ** Adherence to hand hygiene measure was defined as disinfection of hands at least 5 times per day during the 5 day after full implementation of the intervention (based on data from daily questionnaire). *** based on data from exit questionnaire. #only adults. ## Adherence to facemask intervention was defined as wearing a facemask "mostly" or "always" on each of the 5 days after full implementation of the intervention (based on data from daily questionnaire)
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