Table 1:

Database population selection

Step	Selection Criteria	Excluding	Remaining n
1	Ovarian cancer	0	79486
2	1st cancer-ovarian cancer	8571	70915
3	Year of diagnosis 1992–2015	1423	69492
4	Age 66 and older	25685	43807
5	AJCC Stage II-IV and Stage Unknown	5323	38484
6	Selected patients whose ICD-O-3 histology codes were consistent with the adenocarcinomas of the ovary but excluding borderline tumors, stromal and germ cell tumors	9978	28506
7	Patients with pathologic confirmation	318	28188
8	Exclude patients diagnosed at autopsy or by death certificate only	31	28157
9	Full Medicare A and B coverage and No HMO enrollment 12 months before diagnosis to 12 months after diagnosis	9464	18693
10	ICD code for abdominal/pelvic pain (625.0,625.5,625.9,789.01–789.09), bloating (789.30–789.39), urinary symptoms (788.1,788.3,788.4), or difficulty eating (536.0,536.9,564.0,738.0,787.02,787.3,787.9,787.91)	4821	13872

AJCC, American Joint Committee on Cancer; ICD-O, International Classification of Diseases for Oncology; HMO, Health Maintenance Organization; ICD, International Classification of Diseases