1. Haller G, Myles PS, Taffe P, Perneger TV, Wu CL. Rate
of undesirable events at beginning of academic year:
retrospective cohort study. BMJ. 2009; 339(1):b3974
2. Phillips DP, Barker GE. A July spike in fatal medication
errors: a possible effect of new medical residents. J
Gen Intern Med. 2010; 25(8):774-9.
3. Riguzzi C, Hern HG, Vahidnia F, Herring A, Alter H.
The July effect: is emergency department length of
stay greater at the beginning of the hospital academic
year? West J Emerg Med. 2014; 15(1):88-93.
4. Gopaldas RR, Overbey DM, Dao TK, Markley JG. The
impact of academic calendar cycle on coronary artery
bypass outcomes: a comparison of teaching and
non-teaching hospitals. J Cardiothorac Surg. 2013;
8(10):191.
5. Englesbe MJ, Pelletier SJ, Magee JC, Gauger P,
Schifftner T, Henderson WG, et al. Seasonal variation
in surgical outcomes as measured by the american
college of surgeons-national surgical quality
improvement program (ACS-NSQIP). Ann Surg.
2007; 246(3):456-65.
6. McDonald JS, Clarke MJ, Helm GA, Kallmes DF. The
effect of July admission on inpatient outcomes
following spinal surgery. J Neurosurg Spine. 2013;
18(3):280-8.
7. Ravi P, Trinh VQ, Sun M, Sammon J, Sukumar S, Gervais
MK, et al. Is there any evidence of a “July effect” in
patients undergoing major cancer surgery? Can J
Surg. 2014; 57(2):82-8.
8. Jena AB, Sun EC, Romley JA. Mortality among high-risk
patients with acute myocardial infarction admitted to
US teaching-intensive hospitals in July: a retrospective
observational study. Circulation. 2014; 130(10):e93.
9. Padegimas EM, Maltenfort M, Lazarus MD, Ramsey
ML, Williams GR, Namdari S. Future patient demand
for shoulder arthroplasty by younger patients:
national projections. Clin Orthop Relat Res. 2015;
473(6):1860-7.
10. Ricchetti ET, Abboud JA, Kuntz AF, Ramsey ML, Glaser
DL, Williams GR. Total shoulder arthroplasty in older
patients: increased perioperative morbidity? Clin
Orthop Relat Res. 2011; 469(4):1042-9.
11. Schairer WW, Nwachukwu BU, Lyman S, Craig EV,
Gulotta LV. National utilization of reverse total
shoulder arthroplasty in the United States. J Shoulder
Elbow Surg. 2015; 24(1):91-7.
12. Hicks CW, Hashmi ZG, Hui X, Velopulos C, Efron DT,
Schneider EB, et al. Explaining the paradoxical agebased
racial disparities in survival after trauma:
the role of the treating facility. Ann Surg. 2014;
262(1):179-83.
13. Kozhimannil KB, Hung P, Prasad S, Casey M, Moscovice
I. Rural-urban differences in obstetric care, 2002-
2010, and implications for the future. Med Care. 2014;
52(1):4-9.
14. Monn MF, Calaway AC, Mellon MJ, Bahler CD,
Sundaram CP, Boris RS. Changing USA national trends
for adrenalectomy: the influence of surgeon and
technique. BJU Int. 2015; 115(2):288-94.
15. Oladeji LO, Raley JA, Menendez ME, Ponce BA.
Risk factors for in-hospital myocardial infarction
after shoulder arthroplasty. Am J Orthop. 2015;
44(5):E142-7.
16. Menendez ME, Ring D. Failure to rescue after proximal
femur fracture surgery. J Orthop Trauma. 2015;
29(3):e96-102.
17. Nandyala SV, Marquez-Lara A, Fineberg SJ, Singh
K. Perioperative characteristics and outcomes of
patients undergoing anterior cervical fusion in July:
analysis of the “July Effect.” Spine. 2014; 39(7):612-7.
18. Menendez ME, Neuhaus V, van Dijk CN, Ring D. The
Elixhauser comorbidity method outperforms the
Charlson index in predicting inpatient death after
orthopaedic surgery. Clin Orthop Relat Res. 2014;
472(9):2878-86.
19. Menendez ME, Ring D, Bateman BT. Preoperative
opioid misuse is associated with increased morbidity
and mortality after elective orthopaedic surgery. Clin
Orthop Relat Res. 2015; 473(7):2402-12.
20. Padegimas EM, Maltenfort M, Ramsey ML, Williams
GR, Parvizi J, Namdari S. Periprosthetic shoulder
infection in the United States: incidence and economic
burden. J Shoulder Elbow Surg. 2015; 24(5):741-6.
21. Smucny M, Menendez ME, Ring D, Feeley BT,
Zhang AL. Inpatient surgical site infection after
shoulder arthroplasty. J Shoulder Elbow Surg. 2015;
24(5):747-53.
22. Young BL, Menendez ME, Baker DK, Ponce BA. Factors
associated with in-hospital pulmonary embolism
after shoulder arthroplasty. J Shoulder Elbow Surg.
2015; 24(10):e271-8.
23. Dimick JB, Cowan JA Jr, Colletti LM, Upchurch GR Jr.
Hospital teaching status and outcomes of complex
surgical procedures in the United States. Arch Surg.
2004; 139(2):137-41.
24. Warraich H. A doctor’s view: the “July effect” may be
the opposite of what you think. Boston Globe. 2014;
8(3):3485.
25. Young JQ, Ranji SR, Wachter RM, Lee CM, Niehaus B,
Auerbach AD. “July effect”: impact of the academic yearend
changeover on patient outcomes: a systematic
review. Ann Intern Med. 2011; 155(5):309-15.
26. Harring TR, Nguyen NT, Liu H, Goss JA, O’Mahony CA.
Liver transplant fellowship and resident training is not
a part of the “July effect.” J Surg Res. 2013; 182(1):1-5.
27. Karipineni F, Panchal H, Khanmoradi K, Parsikhia
A, Ortiz J. The “July effect” does not have clinical
relevance in liver transplantation. J Surg Educ. 2013;
70(5):669-79.
28. Edelstein AI, Lovecchio FC, Saha S, Hsu WK, Kim
JYS. Impact of resident involvement on orthopaedic
surgery outcomes: an analysis of 30,628 patients from
the American college of surgeons national surgical
quality improvement program database. J Bone Joint
Surg Am. 2014; 96(15):e131.
29. Nandyala SV, Marquez-Lara A, Fineberg SJ, Singh
K. Perioperative characteristics and outcomes of
patients undergoing anterior cervical fusion in July:
analysis of the “July effect.” Spine. 2014; 39(7):612-7.
30. Hoashi JS, Samdani AF, Betz RR, Bastrom TP, Harms
Study Group, Cahill PJ. Is there a “July Effect” in
surgery for adolescent idiopathic scoliosis? J Bone
Joint Surg Am. 2014; 96(7):e55.
31. Haughom BD, Schairer WW, Hellman MD, Yi PH,
Levine BR. Resident involvement does not influence
complication after total hip arthroplasty: an analysis
of 13,109 cases. J Arthroplasty. 2014; 29(10):1919-24.
32. Bohl DD, Fu MC, Golinvaux NS, Basques BA, Gruskay
JA, Grauer JN. The “July Effect” in Primary Total Hip
and Knee Arthroplasty: Analysis of 21,434 Cases
From the ACS-NSQIP Database. J Arthroplasty. 2014;
29(7):1332-8.
33. Cvetanovich GL, Schairer WW, Haughom BD, Nicholson
GP, Romeo AA. Does resident involvement have an
impact on postoperative complications after total
shoulder arthroplasty? An analysis of 1382 cases. J
Shoulder Elbow Surg. 2015; 24(10):1567-73.
34. Campbell PG, Malone J, Yadla S, Chitale R, Nasser R,
Maltenfort MG, et al. Comparison of ICD-9-based,
retrospective, and prospective assessments of
perioperative complications: assessment of accuracy
in reporting. J Neurosurg Spine. 2011; 14(1):16-22.
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