Circumstance of endoscopic and laparoscopic treatments for gastric cancer in Japan: A review of epidemiological studies using a national administrative database

Table 1 Contents of data in the national administrative database[22]

Hospital information

Location of hospital

Number of beds

Patient background information

Age

Sex

Zip code

Diagnoses

Main diagnoses (coded with International Classification of Diseases and Injuries 10th Revision

(ICD-10th) code)

Main diagnoses (coded with the ICD-10th codes)

Complications after admission (coded with the ICD-10th codes)

Procedures for patients

Surgery, anesthesia and other procedures (coded with the Japanese original codes)

Drugs and devices (coded with the Japanese original codes)

Dates of each procedure

Dates of use for each drug and device

Admission and discharge data

Urgent or elective admission

Ambulance service use

Dates of admission and discharge; length of stay

Discharge status (discharge to home, rehabilitation hospital or other facility, or death)

Claim data

Total charge

Itemized charges for hospitalization, medication, examination, surgery and others

Other clinical data

Height/body weight

Smoking index

Pregnancy

Japan Coma Scale at admission

TNM classification of malignant tumors

Activity of Daily Living scale

Modified Rankin scale

Hugh-Jones classification of respiratory status

New York Heart Association classification of heart failure symptoms

Canadian Cardiovascular Society classification of angina pectoris

Killip classification of acute myocardial infarction

Severity classification of community-acquired pneumonia

Child-Pugh classification of liver cirrhosis

Severity classification of acute pancreatitis

Burn index

Global Assessment of Functioning scale

Table 2 Reports of endoscopic and laparoscopic treatments for gastric cancer using national administrative database

	No. of patients	No. of hospitals	Study period	Investigated outcomes
Endoscopic submucosal dissection
Murata et al[27]	32943	907	2009-2011	Complications, length of stay, and medical costs
Murata et al[30]	27385	867	2009-2011	Complications and length of stay
Murata et al[36]	27385	867	2009-2011	Complications, length of stay, and medical costs
Laparoscopic gastrectomy
Yasunaga et al[40]	9388	805	2010	Complications, length of stay, medical costs, in-hospital mortality and 30-d readmission rates
Kuwabara et al[41]	17761	258	2006-2008	Length of hospital stay, medical costs and operative time
Murata et al[42]	14006	744	2009-2011	Complications, length of stay, medical costs and in-hospital mortality
Kuwabara et al[46]	3054	420	2007	Complications and operative time
Kuwabara et al[47]	3914	258	2006-2008	Complications, length of stay, medical costs, in-hospital mortality and blood transfusions
Ryu et al[48]	209	5	2007-2008	Length of hospital stay (pre and post operative) and duration of antibiotic administration and post operative fasting