, 18th and 19th of August, respectively) and affected nearly all HCWs categories (figure 2),working areas (figure 3), and type of indication (data not shown).These evaluations coincided with the statutory lay-off proceeding that took place in our Center at that time. Statistical control related to “bimonthly AHRs consumption process” is shown in figure 4. From July 2008 until DecemberPLOS ONE | www.plosone.orgHospital Wide Hand Hygiene InterventionTable 3. Main epidemiological characteristics of the two Intervention phases.Variable Hand rub alcohol dispensers/beds (ratio) Direct observation sessions performed *(n) Opportunities for HH by session (median, IQR) Overall time observation (hours) Hand hygiene performance ( ) Alcohol Soap Alcohol Soap Not performed (not wearing gloves) Not performed (wearing gloves) HCWs observed by session (average, SD) Nurses Assistant Nurses Physicians Others Hand hygiene opportunities/hour Nurses Assistant Nurses Physicians Others HH adherence by HCW subcategories CrotalineMedChemExpress Crotaline Nursing Nursing Staff N Compliance, (95 CI) Student nurses N Compliance, (95 CI) Nursing assistants Nursing assistants staff N Compliance, (95 CI) Student nursing assistants N Compliance, (95 CI) Physicians Clinicians N Compliance, (95 CI) Surgeons N Compliance, (95 CI) Medicine students N Compliance, (95 CI) Others Orderlies N Compliance, (95 CI)T1 (January 2010 ecember 2010) 0.57 (123/217) 277 14 (8?1) 138.T2 (January 2011 ecember 2011) 1.56 (340/217) 542 13 (9?9)70.8 8.3 0.5 14.2 6.76.2 7.8 0.6 11.6 3.1.94 (0.9) 1.73 (1.1) 1.02 (1.1) 0.61 (0.9)1.87 (0.9) 1.73 (0.9) 0.97 (1.1) 0.52 (0.8)13.9 10.1 4.77 2.13.9 9.8 4.14 1.1,803 83 (81.3?4.8)3,347 88 (87.5?9.6)127 96 (92.6?9.4)425 91.5 (88.9?4.2)1,062 89 (87.3?1.1)2,006 91(89.9?2.4)100 95 (90.7?9.3)188 92 (88.2?5.6)374 72 (67.9?6.9)625 69 (65.8?3.1)252 37 (30.9?2.9)343 46 (40.1?1.1)30 93 (84.4?9.9)141 84 (77.6?9.8)226 65 (58.8?1.3)317 72 (66.7?6.6)PLOS ONE | www.plosone.orgHospital Wide Hand Hygiene InterventionTable 3. Cont.Variable Laboratory technicians N Compliance, (95 CI) Radiology technicians N Compliance, (95 CI)T1 (January 2010 ecember 2010)T2 (January 2011 ecember 2011)50 74 (61.8?6.2)129 69 (61.1?6.9)65 21 (11.5?1.5)84 75 (65.7?4.3)*All wards were monitored the same day for a 30 minute session except for Intensive Care Unit and Emergency Department where two different observations by two different hand hygiene monitor team (HHMT) members were planned. doi:10.1371/journal.pone.0047200.t2011, a 172 increase in the expenditure was noted achieving levels above 22 L/1,000 patient-days during 2011. Negative and positive special H 4065 web causes were noted in the 2008?009 period and their probable aetiologies are shown. At the end of 2010 and 2011, numerous “positive special causes” were noted and a clear change of the process of “AHR consumption” was achieved. Time series analysis of “healthcare-acquired MRSA colonization/infections rates” process during the 2007?011 period is illustrated through a Poisson Exponential Weighted Moving Average (PEWMA) control chart (see figure 5). This chart shows a low incidence rate over time (median of 0.77 per 10,000 patientdays) achieving a small but significant decrease in healthcareacquired MRSA colonization/infections rates during the intervention period according to the rule that at least 10 out of 11 consecutive data points fall in zone C or beyond on the same side of the center line (referred as rule 4 in Figure 5). Dur., 18th and 19th of August, respectively) and affected nearly all HCWs categories (figure 2),working areas (figure 3), and type of indication (data not shown).These evaluations coincided with the statutory lay-off proceeding that took place in our Center at that time. Statistical control related to “bimonthly AHRs consumption process” is shown in figure 4. From July 2008 until DecemberPLOS ONE | www.plosone.orgHospital Wide Hand Hygiene InterventionTable 3. Main epidemiological characteristics of the two Intervention phases.Variable Hand rub alcohol dispensers/beds (ratio) Direct observation sessions performed *(n) Opportunities for HH by session (median, IQR) Overall time observation (hours) Hand hygiene performance ( ) Alcohol Soap Alcohol Soap Not performed (not wearing gloves) Not performed (wearing gloves) HCWs observed by session (average, SD) Nurses Assistant Nurses Physicians Others Hand hygiene opportunities/hour Nurses Assistant Nurses Physicians Others HH adherence by HCW subcategories Nursing Nursing Staff N Compliance, (95 CI) Student nurses N Compliance, (95 CI) Nursing assistants Nursing assistants staff N Compliance, (95 CI) Student nursing assistants N Compliance, (95 CI) Physicians Clinicians N Compliance, (95 CI) Surgeons N Compliance, (95 CI) Medicine students N Compliance, (95 CI) Others Orderlies N Compliance, (95 CI)T1 (January 2010 ecember 2010) 0.57 (123/217) 277 14 (8?1) 138.T2 (January 2011 ecember 2011) 1.56 (340/217) 542 13 (9?9)70.8 8.3 0.5 14.2 6.76.2 7.8 0.6 11.6 3.1.94 (0.9) 1.73 (1.1) 1.02 (1.1) 0.61 (0.9)1.87 (0.9) 1.73 (0.9) 0.97 (1.1) 0.52 (0.8)13.9 10.1 4.77 2.13.9 9.8 4.14 1.1,803 83 (81.3?4.8)3,347 88 (87.5?9.6)127 96 (92.6?9.4)425 91.5 (88.9?4.2)1,062 89 (87.3?1.1)2,006 91(89.9?2.4)100 95 (90.7?9.3)188 92 (88.2?5.6)374 72 (67.9?6.9)625 69 (65.8?3.1)252 37 (30.9?2.9)343 46 (40.1?1.1)30 93 (84.4?9.9)141 84 (77.6?9.8)226 65 (58.8?1.3)317 72 (66.7?6.6)PLOS ONE | www.plosone.orgHospital Wide Hand Hygiene InterventionTable 3. Cont.Variable Laboratory technicians N Compliance, (95 CI) Radiology technicians N Compliance, (95 CI)T1 (January 2010 ecember 2010)T2 (January 2011 ecember 2011)50 74 (61.8?6.2)129 69 (61.1?6.9)65 21 (11.5?1.5)84 75 (65.7?4.3)*All wards were monitored the same day for a 30 minute session except for Intensive Care Unit and Emergency Department where two different observations by two different hand hygiene monitor team (HHMT) members were planned. doi:10.1371/journal.pone.0047200.t2011, a 172 increase in the expenditure was noted achieving levels above 22 L/1,000 patient-days during 2011. Negative and positive special causes were noted in the 2008?009 period and their probable aetiologies are shown. At the end of 2010 and 2011, numerous “positive special causes” were noted and a clear change of the process of “AHR consumption” was achieved. Time series analysis of “healthcare-acquired MRSA colonization/infections rates” process during the 2007?011 period is illustrated through a Poisson Exponential Weighted Moving Average (PEWMA) control chart (see figure 5). This chart shows a low incidence rate over time (median of 0.77 per 10,000 patientdays) achieving a small but significant decrease in healthcareacquired MRSA colonization/infections rates during the intervention period according to the rule that at least 10 out of 11 consecutive data points fall in zone C or beyond on the same side of the center line (referred as rule 4 in Figure 5). Dur.
