Chenjuan Ma headshot

Chenjuan Ma


Assistant Professor

1 212 992 7173

433 First Avenue
New York, NY 10010
United States

expand all

collapse all

Professional overview

Dr. Chenjuan Ma is a health services researcher, whose program of research focuses on 1) understanding the role of the organization of nursing and its impact on patient care quality and safety as well as patient outcomes and 2) improve quality of care and patient outcomes via re-structure of modifiable organizational nursing factors. As a nurse scientist with extensive training in health services research, Dr. Ma's research utilizes theories and methodologies from different disciplines, including but not limited to sociology, statistics, medicine, and nursing. Dr. Ma also has expertise in large data sets and quantitative methods. Prior to joining the NYU Rory Meyers College of Nursing as an assistant profession (tenure-track), Dr. Ma was a post-doctoral fellow in the National Database of Nursing Quality Indicators (NDNQI) at the University of Kansas.


PhD(2012) - University of Pennsylvania
MSN(2008) - Xi'an Jiaotong University, China
BSN(2005) - Xi'an Jiaotong University, China

Honors and awards

President Gutmann Leadership Award for Travel, University of Pennsylvania (2011)
Rising Star, Sigma Theta Tau International Honor Society of Nursing Xi Chapter (2011)
ThinkSwiss Award, University of Basel, Switzerland (2011)
Outstanding Student Leader, Xi'an Jiaotong University, China (2008)


Nursing workforce
Home care
Research methods

Professional membership

Eastern Nursing Research Society
MidWest Nursing Research Society (2014-2015)
American Nurses Association (2014-2015)
Young Professional Commission, the Advisory Group for The Global Commission on Education Of the Health Professionals for the 21st Century (2010)



The association between nurse shift patterns and nurse-nurse and nurse-physician collaboration in acute care hospital units

Ma, C., & Stimpfel, A. W. (2018). Journal of Nursing Administration, 48(6), 335-341. 10.1097/NNA.0000000000000624
OBJECTIVE The aim of this study was to examine the impact of nurse shift patterns on nurses' collaboration with nurses and physicians in US acute care hospital units. BACKGROUND Collaboration between nurses and other healthcare providers is critical for ensuring quality patient care. Nurses perform collaboration during their shift work; thus, nurse shift patterns may influence collaboration. However, there is a dearth of empirical evidence of the relationship between nurse shift patterns and collaboration of nurses with other healthcare providers. METHODS This is a cross-sectional study using data from 957 units in 168 acute care hospitals. Measures of collaboration include nurse-nurse collaboration and nurse-physician collaboration. Measures of shift patterns included shift length and overtime. Multilevel linear regressions were conducted at the unit level, controlling unit and hospital characteristics. RESULTS Overtime (more nurses working overtime or longer overtime hours) was associated with lower collaboration at the unit level; however, shift length was not. CONCLUSIONS Working overtime may negatively influence nurses' collaboration with other healthcare providers.

Inter- and intra-disciplinary collaboration and patient safety outcomes in U.S. acute care hospital units: A cross-sectional study

Ma, C., Park, S. H., & Shang, J. (2018). International Journal of Nursing Studies, 85, 1-6. 10.1016/j.ijnurstu.2018.05.001
Background: Collaboration among healthcare providers has been considered a promising strategy for improving care quality and patient outcomes. Despite mounting evidence demonstrating the impact of collaboration on outcomes of healthcare providers, there is little empirical evidence on the relationship between collaboration and patient safety outcomes, particularly at the patient care unit level. Objectives: The purpose of this study is to identify the extent to which interdisciplinary collaboration between nurses and physicians and intradisciplinary collaboration among nurses on patient care units are associated with patient safety outcomes. Methods: This is a cross-sectional study using nurse survey data and patient safety indicators data from U.S. acute care hospital units. Collaboration at the unit level was measured by two 6-item scales: nurse-nurse interaction scale and nurse-physician interaction scale. Patient outcome measures included hospital-acquired pressure ulcers (HAPUs) and patient falls. The unit of analysis was the patient care unit, and the final sample included 900 units of 5 adult unit types in 160 hospitals in the U.S. Multilevel logistic and Poisson regressions were used to estimate the relationship between collaboration and patient outcomes. All models were controlled for hospital and unit characteristics, and clustering of units within hospitals was considered. Results: On average, units had 26 patients with HAPUs per 1000 patients and 3 patient falls per 1000 patient days. Critical care units had the highest HAPU rate (50/1000 patients) and the lowest fall rate (1/1000 patient days). A one-unit increase in the nurse-nurse interaction scale score led to 31% decrease in the odds of having a HAPU (OR, 0.69; 95% CI, 0.56–0.82) and 8% lower patient fall rate (IRR, 0.92; 95% CI, 0.87–0.98) on a nursing unit. A one-unit increase in the nurse-physician interaction scale score was associated with 19% decrease in the odds of having a HAPU (OR, 0.81; 95% CI, 0.68–0.97) and 13% lower fall rates (IRR, 0.87; 95% CI, 0.82–0.93) on a unit. Conclusions: Both nurse-physician collaboration and nurse-nurse collaboration were significantly associated with patient safety outcomes. Findings from this study suggest that improving collaboration among healthcare providers should be considered as an important strategy for promoting patient safety and both interdisciplinary and intradisciplinary collaboration are critical for achieving better patient outcomes.

Recent Trends in Baccalaureate-Prepared Registered Nurses in U.S. Acute Care Hospital Units, 2004–2013: A Longitudinal Study

Ma, C., Garrard, L., & He, J. (2018). Journal of Nursing Scholarship, 50(1), 83-91. 10.1111/jnu.12347
Purpose: To examine the trends in baccalaureate (bachelor of science in nursing)–prepared registered nurses (BSN RNs) in U.S. acute care hospital units and to project the growth in the number of BSN RNs by 2020. Design: This is a longitudinal study using the Registered Nurse Education Indicators data (2004–2013) from the National Database of Nursing Quality Indicators. Methods: The level of BSN RNs in each unit was operationalized as the proportion of nurses holding a baccalaureate degree or higher among all the nurses in a unit. Our sample included 12,194 unit-years from 2,126 units of six cohorts in 377 U.S. acute care hospitals. A hierarchical linear regression model was used to examine the trends in BSN RNs and to project future growth in the number of BSN RNs when controlling for hospital and unit characteristics and considering repeated measures in units over time and clustering of units within hospitals. Results: The proportion of BSN RNs in U.S. acute care hospital units increased from 44% in 2004 to 57% in 2013 (a 30% increase); when combining all cohorts, this rate increased from 44% in 2009 to 51% in 2013. On average, the proportion of BSN RNs in a unit increased by 1.3% annually before 2010 and by 1.9% each year from 2010 on. The percentage of units having at least 80% of their nurses with a baccalaureate degree or higher increased from 3% in 2009 to 7% in 2013. Based on the current trends, 64% of the nurses working in a hospital unit will have a baccalaureate degree by 2020, and 22% of the units will reach the 80% goal by 2020. Conclusions: There was a significant increase in the proportion of BSN RNs in U.S. acute care hospital units over the past decade, particularly after 2010. However, given the current trends, it is unlikely that the goal of 80% nurses with a baccalaureate degree will be achieved by 2020. Clinical Relevance: The U.S. nursing workforce is under educational transformation in order to meet the increasing healthcare needs. To help accelerate this transformation, further advocacy, commitment, and investment are needed from all healthcare stakeholders (e.g., policymakers, executives and managers of healthcare facilities, nursing schools, etc.).

Hospital Magnet Status, Unit Work Environment, and Pressure Ulcers

Ma, C., & Park, S. H. (2015). Journal of Nursing Scholarship, 47(6), 565-573. 10.1111/jnu.12173
Purpose: To identify how organizational nursing factors at different structural levels (i.e., unit-level work environment and hospital Magnet status) are associated with hospital-acquired pressure ulcers (HAPUs) in U.S. acute care hospitals. Design: A cross-sectional observational study used data from the National Database of Nursing Quality Indicators®. Responses from 33,845 registered nurses (RNs) were used to measure unit work environments. The unit of analysis was the nursing unit, and there were 1,381 units in 373 hospitals in the United States. Methods: Unit work environment was measured by the Practice Environment Scale of Nurse Working Index (PES-NWI). Multilevel logistic regressions were used to estimate the effects of unit work environment and hospital Magnet status on HAPUs. All models were controlled for hospital and unit characteristics when considering clustering of units within hospitals. Results: Magnet hospital units had 21% lower odds of having an HAPU than non-Magnet hospital units (95% confidence interval [CI], 0.64-0.98). With one unit increase of the PES-NWI score, units had 29% lower odds of having an HAPU (95% CI, 0.55-0.91). When including both hospital Magnet status and unit work environment in the model, hospital Magnet status no longer had a significant effect on HAPUs (odds ratio [OR] = 0.82; 95% CI, 0.66-1.02), whereas the significant effect of unit work environment persisted (OR = 0.73; 95% CI, 0.56-0.93). Conclusions: Both hospital and unit environments were significantly associated with HAPUs, and the unit-level work environment can be more influential in reducing HAPUs. Clinical Relevance: Investment in the nurse work environments at both the hospital level and unit level has the potential to reduce HAPUs; and additional to hospital-level initiatives (e.g., Magnet recognition program), efforts targeting on-unit work environments deserve more attention.

Linking unit collaboration and nursing leadership to nurse outcomes and quality of care

Ma, C., Shang, J., & Bott, M. J. (2015). Journal of Nursing Administration, 45(9), 435-442. 10.1097/NNA.0000000000000229
OBJECTIVE: The objective of this study is to identify the effects of unit collaboration and nursing leadership on nurse outcomes and quality of care. BACKGROUND: Along with the current healthcare reform, collaboration of care providers and nursing leadership has been underscored; however, empirical evidence of the impact on outcomes and quality of care has been limited. METHODS: Data from 29742 nurses in 1228 units of 200 acute care hospitals in 41 states were analyzed using multilevel linear regressions. Collaboration (nurse-nurse collaboration and nurse-physician collaboration) and nursing leadership were measured at the unit level. Outcomes included nurse job satisfaction, intent to leave, and nurse-reported quality of care. RESULTS: Nurses reported lower intent to leave, higher job satisfaction, and better quality of care in units with better collaboration and stronger nursing leadership. CONCLUSION: Creating a care environment of strong collaboration among care providers and nursing leadership can help hospitals maintain a competitive nursing workforce supporting high quality of care.

Nurse work environment and quality of care by unit types: A cross-sectional study

Ma, C., Olds, D. M., & Dunton, N. E. (2015). International Journal of Nursing Studies, 52(10), 1565-1572. 10.1016/j.ijnurstu.2015.05.011
BACKGROUND: Nursing unit is the micro-organization in the hospital health care system in which integrated patient care is provided. Nursing units of different types serve patients with distinct care goals, clinical tasks, and social structures and norms. However, empirical evidence is sparse on unit type differences in quality of care and its relation with nurse work environment. Nurse work environment has been found as an important nursing factor predicting nurse and patient outcomes.OBJECTIVES: To examine the unit type differences in nurse-reported quality of care, and to identify the association between unit work environment and quality of care by unit types.METHODS: This is a cross-sectional study using nurse survey data (2012) from US hospitals nationwide. The nurse survey collected data on quality of care, nurse work environment, and other work related information from staff nurses working in units of various types. Unit types were systematically classified across hospitals. The unit of analysis was the nursing unit, and the final sample included 7677 units of 14 unit types from 577 hospitals in 49 states in the US. Multilevel regressions were used to assess the relationship between nurse work environment and quality of care across and by unit types.RESULTS: On average, units had 58% of the nurses reporting excellent quality of care and 40% of the nurses reporting improved quality of care over the past year. Unit quality of care varied by unit types, from 43% of the nurses in adult medical units to 73% of the nurses in interventional units rating overall quality of care on unit as excellent, and from 35% of the nurses in adult critical care units to 44% of the nurses in adult medical units and medical-surgical combined units reporting improved quality of care. Estimates from regressions indicated that better unit work environments were associated with higher quality of care when controlling various hospital and unit covariates; and this association persisted among units of different types.CONCLUSIONS: Unit type differences exist in the overall quality of care as well as achievement in improving quality of care. The low rates of nurses reporting improvement in the quality of nursing care to patients suggest that further interventions focusing at the unit-level are needed for achieving high care quality. Findings from our study also suggest that improving nurse work environments can be an effective strategy to improve quality of care.

Organization of hospital nursing and 30-Day readmissions in Medicare patients undergoing surgery

Ma, C., McHugh, M. D., & Aiken, L. H. (2015). Medical Care, 53(1), 65-70. 10.1097/MLR.0000000000000258
Background: Growing scrutiny of readmissions has placed hospitals at the center of readmission prevention. Little is known, however, about hospital nursing-a critical organizational component of hospital service system-in relation to readmissions. Objectives: To determine the relationships between hospital nursing factors-nurse work environment, nurse staffing, and nurse education-and 30-day readmissions among Medicare patients undergoing general, orthopedic, and vascular surgery. Method and Design: We linked Medicare patient discharge data, multistate nurse survey data, and American Hospital Association Annual Survey data. Our sample included 220,914 Medicare surgical patients and 25,082 nurses from 528 hospitals in 4 states (California, Florida, New Jersey, and Pennsylvania). Risk-Adjusted robust logistic regressions were used for analyses. Results: The average 30-day readmission rate was 10% in our sample (general surgery: 11%; orthopedic surgery: 8%; vascular surgery: 12%). Readmission rates varied widely across surgical procedures and could be as high as 26% (upper limb and toe amputation for circulatory system disorders). Each additional patient per nurse increased the odds of readmission by 3% (OR = 1.03; 95% CI, 1.00-1.05). Patients cared in hospitals with better nurse work environments had lower odds of readmission (OR = 0.97; 95% CI, 0.95-0.99). Administrative support to nursing practice (OR = 0.96; 95% CI, 0.94-0.99) and nurse-physician relations (OR = 0.97; 95% CI, 0.95-0.99) were 2 main attributes of the work environment that were associated with readmissions. Conclusions: Better nurse staffing and work environment were significantly associated with 30-day readmission, and can be considered as system-level interventions to reduce readmissions and associated financial penalties.

"Can nurse work environment influence readmission risk?" A systematic review

Ma, C., Shang, J., & Stone, P. (2014). Nursing: Research & Reviews, 4, 91-101.

Low blood zinc, iron, and other sociodemographic factors associated with behavior problems in preschoolers

Liu, J., Hanlon, A., Ma, C., Zhao, S. R., Cao, S., & Compher, C. (2014). Nutrients, 6(2), 530-545. 10.3390/nu6020530
Previous research supports the link among malnutrition, cognitive dysfunction, and behavioral outcomes; however, less research has focused on micronutrient deficiencies. This study investigates whether micronutrient deficiencies, specifically blood zinc and iron levels, will be associated with increased behavior problem scores, including internalizing and externalizing behaviors. 1314 Children (55% boys and 45% girls) from the Jintan Preschool Cohort in China participated in this study. Venous blood samples were collected and analyzed for zinc and iron when the children were 3-5 years old. Behavior problems were measured with the Child Behavior Checklist (CBCL), which was completed by the parents when children were in their last months of preschool (mean age 5.6 years). General linear multivariate modeling was used, with adjustment for important sociodemographic variables. The results indicate that low zinc levels alone (p = 0.024) and combined low zinc and iron levels (p = 0.022) are significantly associated with increased reports of total behavior problems. We did not find an association between low iron and behavior problems. With regards to sociodemographics, living in the suburbs is associated with increased internalizing problems, while higher mother's education and being female were associated with decreased externalizing problems. This study suggests that micronutrient deficiencies and sociodemographic facts are associated with behavior problems in preschoolers.

Nurse employment contracts in Chinese hospitals: Impact of inequitable benefit structures on nurse and patient satisfaction

Shang, J., You, L., Ma, C., Altares, D., Sloane, D. M., & Aiken, L. H. (2014). Human Resources for Health, 12(1). 10.1186/1478-4491-12-1
Purpose: Ongoing economic and health system reforms in China have transformed nurse employment in Chinese hospitals. Employment of 'bianzhi' nurses, a type of position with state-guaranteed lifetime employment that has been customary since 1949, is decreasing while there is an increase in the contract-based nurse employment with limited job security and reduced benefits. The consequences of inequities between the two types of nurses in terms of wages and job-related benefits are unknown. This study examined current rates of contract-based nurse employment and the effects of the new nurse contract employment strategy on nurse and patient outcomes in Chinese hospitals.Methods: This cross-sectional study used geographically representative survey data collected from 2008 to 2010 from 181 hospitals in six provinces, two municipalities, and one autonomous region in China. Logistic regression models were used to estimate the association between contract-based nurse utilization, dissatisfaction among contract-based nurses, nurse intentions to leave their positions, and patient satisfaction, controlling for nurse, patient, and hospital characteristics.Principal Results: Hospital-level utilization of contract-based nurses varies greatly from 0 to 91%, with an average of 51%. Contract-based nurses were significantly more dissatisfied with their remuneration and benefits than 'bianzhi' nurses who have more job security (P <0.01). Contract-based nurses who were dissatisfied with their salary and benefits were more likely to intend to leave their current positions (P <0.01). Hospitals with high levels of dissatisfaction with salary and benefits among contract-based nurses were rated lower and less likely to be recommended by patients (P < 0.05).Conclusions: Our results suggest a high utilization of contract-based nurses in Chinese hospitals, and that the inequities in benefits between contract-based nurses and 'bianzhi' nurses may adversely affect both nurse and patient satisfaction in hospitals. Our study provides empirical support for the 'equal pay for equal work' policy emphasized by the China Ministry of Health's recent regulations, and calls for efforts in Chinese hospitals to eliminate the disparities between 'bianzhi' and contract-based nurses.