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Quality

Quality Care and Patient Safety

CHA is a regional healthcare system that cares for patients in hospitals and clinics across the Boston metro-north communities. Our top priority is to keep patients safe and reduce medical errors using the principles of high reliability.  

Our High Reliability Work

A High Reliability Organization (HRO) is an entity that operates in high-stakes, complex, and hazardous environments—such as nuclear power plants, aviation, or healthcare—while maintaining exceptionally low rates of errors or catastrophic failures. HROs focus on safety and accountability to anticipate risks before they cause harm.

At CHA, we have embraced these standards to improve communication, workflows, and safety procedures across our system. This has allowed us to improve teamwork and provide better care and support to every patient and family member who visits us. 

Quality Data

All hospitals and healthcare providers are required to report quality data to the Center for Medicare and Medicaid Services (CMS). To see how CHA is performing compared to other local hospitals, visit the Hospital Compare website.

ICU Staffing Ratios

All Massachusetts Hospitals are required to post an "ICU staffing report" for review by patients and regulatory agencies. This indicates the average number of patients our ICU nurses care for during a given work day.

ICU Staffing Ratios: Jan - Mar 2026
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census  4.200   Average Daily Patient Census 6.100
Average Daily Staff Nurse Census 3.17079   Average Daily Staff Nurse Census 3.93178
Average Daily Staff Nurse to Patient Ratio 1:1.32459   Average Daily Staff Nurse to Patient Ratio 1:1.55146
ICU Staffing Ratios: Oct - Dec 2025
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census  3.900   Average Daily Patient Census 4.900
Average Daily Staff Nurse Census 3.05005   Average Daily Staff Nurse Census 3.39644
Average Daily Staff Nurse to Patient Ratio 1:1.27867   Average Daily Staff Nurse to Patient Ratio 1:1.44269
ICU Staffing Ratios: Jul - Sep 2025
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census  4.2000 Average Daily Patient Census 6.1000
Average Daily Staff Nurse Census 3.17079 Average Daily Staff Nurse Census 3.93178
Average Daily Staff Nurse to Patient Ratio 1:1.32459 Average Daily Staff Nurse to Patient Ratio 1:1.55146
ICU Staffing Ratios: Apr - Jun 2025
CHA Cambridge Hospital CHA Everett Hospital
Average Daily Patient Census 3.000 Average Daily Patient Census 4.200
Average Daily Staff Nurse Census 2.82555 Average Daily Staff Nurse Census 3.22253
Average Daily Staff Nurse to Patient Ratio 1:1.06174 Average Daily Staff Nurse to Patient Ratio 1:1.30332
ICU Staffing Ratios: Jan - Mar 2025
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    4.200   Average Daily Patient Census   6.100
Average Daily Staff Nurse Census   3.17079 Average Daily Staff Nurse Census   3.93178
Average Daily Staff Nurse to Patient Ratio   1:1.32459 Average Daily Staff Nurse to Patient Ratio  1:1.55146
ICU Staffing Ratios: Oct - Dec 2024
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    3.300   Average Daily Patient Census   4.400
Average Daily Staff Nurse Census   2.73075 Average Daily Staff Nurse Census   3.40391
Average Daily Staff Nurse to Patient Ratio   1:1.20846 Average Daily Staff Nurse to Patient Ratio  1:1.29263
ICU Staffing Ratios: Jul - Sep 2024
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    2.80000   Average Daily Patient Census   4.10000
Average Daily Staff Nurse Census   2.67541 Average Daily Staff Nurse Census   3.37749
Average Daily Staff Nurse to Patient Ratio   1:1.04657 Average Daily Staff Nurse to Patient Ratio  1:1.21392
ICU Staffing Ratios: Apr - Jun 2024
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    3.30000   Average Daily Patient Census   4.70000
Average Daily Staff Nurse Census   2.98901 Average Daily Staff Nurse Census   3.58974
Average Daily Staff Nurse to Patient Ratio   1:1.10404 Average Daily Staff Nurse to Patient Ratio  1:1.30929
ICU Staffing Ratios: Jan - Mar 2024
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    4.20000   Average Daily Patient Census   6.10000
Average Daily Staff Nurse Census   3.17079 Average Daily Staff Nurse Census   3.93178
Average Daily Staff Nurse to Patient Ratio   1:1.32459 Average Daily Staff Nurse to Patient Ratio  1:1.55146
ICU Staffing Ratios: Oct - Dec 2023
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    3.73913   Average Daily Patient Census   5.27174
Average Daily Staff Nurse Census   2.85802 Average Daily Staff Nurse Census   3.65006
Average Daily Staff Nurse to Patient Ratio   1: 1.30830 Average Daily Staff Nurse to Patient Ratio  1: 1.44429
ICU Staffing Ratios: Jul - Sep 2023
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    3.80000   Average Daily Patient Census   4.00000
Average Daily Staff Nurse Census   2.14213 Average Daily Staff Nurse Census   3.32271
Average Daily Staff Nurse to Patient Ratio   1: 1.77394 Average Daily Staff Nurse to Patient Ratio  1: 1.20384
ICU Staffing Ratios: Apr - Jun 2023
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    3.10000   Average Daily Patient Census   4.60000
Average Daily Staff Nurse Census   2.90957 Average Daily Staff Nurse Census   3.29190
Average Daily Staff Nurse to Patient Ratio   1: 1.06545 Average Daily Staff Nurse to Patient Ratio  1: 1.39737
ICU Staffing Ratios: Jan - Mar 2023
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    3.50000   Average Daily Patient Census   4.80000
Average Daily Staff Nurse Census   3.01030 Average Daily Staff Nurse Census   3.51794
Average Daily Staff Nurse to Patient Ratio   1: 1.16267 Average Daily Staff Nurse to Patient Ratio  1: 1.36443
ICU Staffing Ratios: Oct - Dec 2022
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census    3.31522   Average Daily Patient Census   4.88043
Average Daily Staff Nurse Census   3.15965 Average Daily Staff Nurse Census   3.63394
Average Daily Staff Nurse to Patient Ratio   1: 1.04924 Average Daily Staff Nurse to Patient Ratio  1: 1.34301
ICU Staffing Ratios: Jul - Sep 2022
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.15217   Average Daily Patient Census  4.26087
Average Daily Staff Nurse Census  3.19882 Average Daily Staff Nurse Census  3.63394
Average Daily Staff Nurse to Patient Ratio  1: 0.98542 Average Daily Staff Nurse to Patient Ratio 1: 1.17252
ICU Staffing Ratios: Apr - Jun 2022
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.30000   Average Daily Patient Census  5.00000
Average Daily Staff Nurse Census  3.84959 Average Daily Staff Nurse Census  4.41941
Average Daily Staff Nurse to Patient Ratio  1: 0.85723 Average Daily Staff Nurse to Patient Ratio 1: 1.13137
ICU Staffing Ratios: Jan - Mar 2022
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   4.20000   Average Daily Patient Census  5.60000
Average Daily Staff Nurse Census  3.64736 Average Daily Staff Nurse Census  4.19329
Average Daily Staff Nurse to Patient Ratio  1: 1.15152 Average Daily Staff Nurse to Patient Ratio 1: 1.33547
ICU Staffing Ratios: Oct - Dec 2021
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   4.80000   Average Daily Patient Census 5.00000
Average Daily Staff Nurse Census  3.57903 Average Daily Staff Nurse Census 3.96911
Average Daily Staff Nurse to Patient Ratio  1: 1.34115 Average Daily Staff Nurse to Patient Ratio 1: 1.25973
ICU Staffing Ratios: Jul - Sep 2021
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   4.40000   Average Daily Patient Census 4.50000
Average Daily Staff Nurse Census  3.72509 Average Daily Staff Nurse Census 4.15229
Average Daily Staff Nurse to Patient Ratio  1: 1.18118 Average Daily Staff Nurse to Patient Ratio 1: 1.08374
ICU Staffing Ratios: Apr - Jun 2021
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   4.40000   Average Daily Patient Census 4.30000
Average Daily Staff Nurse Census  4.25584 Average Daily Staff Nurse Census 4.19975
Average Daily Staff Nurse to Patient Ratio  1: 1.03387 Average Daily Staff Nurse to Patient Ratio 1: 1.02387
ICU Staffing Ratios: Oct - Dec 2019
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   2.70000   Average Daily Patient Census 4.80000
Average Daily Staff Nurse Census  2.47613 Average Daily Staff Nurse Census 3.51780
Average Daily Staff Nurse to Patient Ratio  1: 1.09041 Average Daily Staff Nurse to Patient Ratio 1: 1.36449
ICU Staffing Ratios: Jul - Sep. 2019
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   2.90000   Average Daily Patient Census 4.40000
Average Daily Staff Nurse Census  2.36730 Average Daily Staff Nurse Census 3.12591
Average Daily Staff Nurse to Patient Ratio  1: 1.22502 Average Daily Staff Nurse to Patient Ratio 1: 1.40759
ICU Staffing Ratios: Apr - Jun 2019
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.40000   Average Daily Patient Census 5.60000
Average Daily Staff Nurse Census  2.65810 Average Daily Staff Nurse Census 3.26190
Average Daily Staff Nurse to Patient Ratio  1: 1.27911 Average Daily Staff Nurse to Patient Ratio 1: 1.71679
ICU Staffing Ratios: Jan - Mar 2019
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   4.00000   Average Daily Patient Census 6.1000
Average Daily Staff Nurse Census  2.78639 Average Daily Staff Nurse Census 3.39931
Average Daily Staff Nurse to Patient Ratio  1: 1.43555 Average Daily Staff Nurse to Patient Ratio 1: 1.79448
ICU Staffing Ratios: Oct - Dec 2018
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   5.26413   Average Daily Patient Census 3.65543
Average Daily Staff Nurse Census  3.24321 Average Daily Staff Nurse Census 2.75050
Average Daily Staff Nurse to Patient Ratio  1: 1.62313 Average Daily Staff Nurse to Patient Ratio 1: 1.32901
ICU Staffing Ratios: Jul - Sep 2018
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   2.30435 Average Daily Patient Census 3.63043
Average Daily Staff Nurse Census  2.40104 Average Daily Staff Nurse Census 3.07034
Average Daily Staff Nurse to Patient Ratio  1: 0.95973 Average Daily Staff Nurse to Patient Ratio 1: 1.18242
ICU Staffing Ratios: Apr - Jun 2018
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   2.75 Average Daily Patient Census 3.76
Average Daily Staff Nurse Census  2.57660 Average Daily Staff Nurse Census 3.25412
Average Daily Staff Nurse to Patient Ratio  1: 1.06623 Average Daily Staff Nurse to Patient Ratio 1: 1.15492
ICU Staffing Ratios: Jan - Mar 2018
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.70 Average Daily Patient Census 4.80
Average Daily Staff Nurse Census  2.79620 Average Daily Staff Nurse Census 3.31606
Average Daily Staff Nurse to Patient Ratio  1: 1.32322 Average Daily Staff Nurse to Patient Ratio 1: 1.44750
ICU Staffing Ratios: Oct - Dec 2017
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.50 Average Daily Patient Census 5.50
Average Daily Staff Nurse Census  2.71649 Average Daily Staff Nurse Census 3.04293
Average Daily Staff Nurse to Patient Ratio  1: 1.28843 Average Daily Staff Nurse to Patient Ratio 1: 1.80747
ICU Staffing Ratios: Jul - Sep 2017
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.10 Average Daily Patient Census 4.90
Average Daily Staff Nurse Census  2.52301 Average Daily Staff Nurse Census 2.96821
Average Daily Staff Nurse to Patient Ratio  1: 1.22869 Average Daily Staff Nurse to Patient Ratio 1: 1.65083
ICU Staffing Ratios: Apr - Jun 2017
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.20 Average Daily Patient Census 3.80
Average Daily Staff Nurse Census  2.52788 Average Daily Staff Nurse Census 3.04707
Average Daily Staff Nurse to Patient Ratio  1: 1.26588 Average Daily Staff Nurse to Patient Ratio 1: 1.24710
ICU Staffing Ratios: Jan - Mar 2017
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.80 Average Daily Patient Census 4.30
Average Daily Staff Nurse Census  2.72352 Average Daily Staff Nurse Census 3.16565
Average Daily Staff Nurse to Patient Ratio  1: 1.39525 Average Daily Staff Nurse to Patient Ratio 1: 1.35833
ICU Staffing Ratios: Oct - Dec 2016
CHA Cambridge Hospital   CHA Everett Hospital
Average Daily Patient Census   3.30 Average Daily Patient Census 4.00
Average Daily Staff Nurse Census  2.57450 Average Daily Staff Nurse Census 3.02015
Average Daily Staff Nurse to Patient Ratio  1: 1.28180 Average Daily Staff Nurse to Patient Ratio 1: 1.32444
ICU Staffing Ratios: Jul -Sep 2016
CHA Cambridge Hospital   CHA Everett Hospital    
Average Daily Patient Census   3.41304   Average Daily Patient Census 4.10870
Average Daily Staff Nurse Census  2.71277   Average Daily Staff Nurse Census 2.96649
Average Daily Staff Nurse to Patient Ratio  1: 1.25814   Average Daily Staff Nurse to Patient Ratio 1: 1.38508
ICU Staffing Ratios: Apr - Jun 2016
CHA Cambridge Hospital   CHA Everett Hospital    
Average Daily Patient Census   3.02198   Average Daily Patient Census 4.56044
Average Daily Staff Nurse Census  2.54844   Average Daily Staff Nurse Census 3.22070
Average Daily Staff Nurse to Patient Ratio  1: 1.18581   Average Daily Staff Nurse to Patient Ratio 1: 1.41598
ICU Staffing Ratios: Jan - Mar 2016
CHA Cambridge Hospital   CHA Everett Hospital    
Average Daily Patient Census   4   Average Daily Patient Census 5
Average Daily Staff Nurse Census  3   Average Daily Staff Nurse Census 3
Average Daily Staff Nurse to Patient Ratio  1: 1.4    Average Daily Staff Nurse to Patient Ratio 1: 1.4
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