Table 1.

Search strategy

Search syntax	Database
(“Indirect cost”[TIAB] OR “Cost of illness”[MH] OR “Illness Cost”[TIAB] OR “Sickness Cost”[TIAB] OR “Burden of Illness”[TIAB] OR “Illness Burden”[TIAB] OR “Cost of Disease”[TIAB] OR “Economic Burden of Disease”[TIAB] OR “Disease Cost”[TIAB] OR “Disease Costs”[TIAB] OR “Cost of Sickness”[TIAB] OR “Sickness Costs”[TIAB] OR “Costs of Disease”[TIAB] OR “Productivity costs”[TIAB] OR “Productivity lost”[TIAB] OR “Productivity loss”[TIAB] OR “Absenteeism cost”[TIAB] OR “Human capital”[TIAB] OR “Economic burden”[TIAB]) AND ("Breast Neoplasms"[MH] OR "Breast Tumors"[TIAB] OR "Breast Tumor"[TIAB] OR "Breast Carcinoma"[TIAB] OR "Breast Cancer"[TIAB] OR "Mammary Cancer"[TIAB] OR "Mammary Cancers"[TIAB] OR "Malignant Neoplasm of Breast"[TIAB] OR "Breast Malignant Neoplasm"[TIAB] OR "Breast Malignant Neoplasms"[TIAB] OR "Malignant Tumor of Breast"[TIAB] OR "Breast Malignant Tumor"[TIAB] OR "Breast Malignant Tumors"[TIAB] OR "Cancer of Breast"[TIAB] OR "Cancer of the Breast"[TIAB] OR "advanced breast cancer"[TIAB] OR "mamma cancer"[TIAB] OR "mammary gland cancer"[TIAB])	Pubmed
TS=(“Indirect cost” OR “Cost of illness” OR “Illness Cost” OR “Sickness Cost” OR “Burden of Illness” OR “Illness Burden” OR “Cost of Disease” OR “Economic Burden of Disease” OR “Disease Cost” OR “Disease Costs” OR “Cost of Sickness” OR “Sickness Costs” OR “Costs of Disease” OR “Productivity costs” OR “Productivity lost” OR “Productivity loss” OR “Absenteeism cost” OR “Human capital” OR “Economic burden”) AND TS=("Breast Neoplasms" OR "Breast Tumors" OR "Breast Tumor" OR "Breast Carcinoma" OR "Breast Cancer" OR "Mammary Cancer" OR "Mammary Cancers" OR "Malignant Neoplasm of Breast” OR "Breast Malignant Neoplasm" OR "Breast Malignant Neoplasms" OR "Malignant Tumor of Breast" OR "Breast Malignant Tumor" OR "Breast Malignant Tumors" OR "Cancer of Breast" OR "Cancer of the Breast" OR "advanced breast cancer" OR "mamma cancer” OR "mammary gland cancer")	Web of Science
TITLE-ABS-KEY (“Indirect cost” OR “Cost of illness” OR “Illness Cost” OR “Sickness Cost” OR “Burden of Illness” OR “Illness Burden” OR “Cost of Disease” OR “Economic Burden of Disease” OR “Disease Cost” OR “Disease Costs” OR “Cost of Sickness” OR “Sickness Costs” OR “Costs of Disease” OR “Productivity costs” OR “Productivity lost” OR “Productivity loss” OR “Absenteeism cost” OR “Human capital” OR “Economic burden”) AND TITLE-ABS-KEY ("Breast Neoplasms" OR "Breast Tumors" OR "Breast Tumor" OR "Breast Carcinoma" OR "Breast Cancer" OR "Mammary Cancer" OR "Mammary Cancers" OR "Malignant Neoplasm of Breast” OR "Breast Malignant Neoplasm" OR "Breast Malignant Neoplasms" OR "Malignant Tumor of Breast" OR "Breast Malignant Tumor" OR "Breast Malignant Tumors" OR "Cancer of Breast" OR "Cancer of the Breast" OR "advanced breast cancer" OR "mamma cancer” OR "mammary gland cancer")	Scopus
(“Indirect cost”/exp “Indirect cost”:ti,ab,kw OR “Cost of illness”:ti,ab,kw OR “Illness Cost”:ti,ab,kw OR “Sickness Cost”:ti,ab,kw OR “Burden of Illness”:ti,ab,kw OR “Illness Burden”:ti,ab,kw OR “Cost of Disease”:ti,ab,kw OR “Economic Burden of Disease”:ti,ab,kw OR “Disease Cost”:ti,ab,kw OR “Disease Costs”:ti,ab,kw OR “Cost of Sickness”:ti,ab,kw OR “Sickness Costs”:ti,ab,kw OR “Costs of Disease”:ti,ab,kw OR “Productivity costs”:ti,ab,kw OR “Productivity lost”:ti,ab,kw OR “Productivity loss”:ti,ab,kw OR “Absenteeism cost”:ti,ab,kw OR “Human capital”:ti,ab,kw OR “Economic burden”:ti,ab,kw) AND ("Breast Cancer"/exp OR "Breast Cancer":ti,ab,kw OR "Breast Neoplasms":ti,ab,kw OR "Breast Tumors":ti,ab,kw OR "Breast Tumor":ti,ab,kw OR "Breast Carcinoma":ti,ab,kw OR "Mammary Cancer":ti,ab,kw OR "Mammary Cancers":ti,ab,kw OR "Malignant Neoplasm of Breast":ti,ab,kw OR "Breast Malignant Neoplasm":ti,ab,kw OR "Breast Malignant Neoplasms":ti,ab,kw OR "Malignant Tumor of Breast":ti,ab,kw OR "Breast Malignant Tumor":ti,ab,kw OR "Breast Malignant Tumors":ti,ab,kw OR "Cancer of Breast":ti,ab,kw OR "Cancer of the Breast":ti,ab,kw OR "advanced breast cancer":ti,ab,kw OR "mamma cancer":ti,ab,kw OR "mammary gland cancer":ti,ab,kw)	Embase