Table 2.

Participation Rates to Various Ancillary Components of the Ghana Breast Health Study Among Enrolled Subjects

	Cases		Controls
	Number	Percent	Number	Percent
Enrolled Subjects	2,202	100.0	2,161	100.0
Anthropometric measurements
Yes	2,115	96.0	2,151	99.5
No	87	4.0	10	0.5
Saliva samples
Yes	2,155	97.9	2,134	98.8
No	47	2.1	27	1.2
Blood samples
Yes	2,021	91.8	1,782	82.5
No	181	8.2	379	17.5
Stool samples
Yes	968	58.11	645	46.12
No	699	41.9	754	53.9
N/A (protocol not initiated)	535		762
Biopsy tissue
Yes, pathologic diagnosis rendered	1873	85.1
Yes, inadequate for pathology3	145	6.6
Yes, missing pathology report	29	1.3
Diagnosis confirmed in other ways4	81	3.7
No biopsy attempted5	53	2.4
Unknown biopsy status	21	0.9

¹Used denominator of 1,667 (sample collection after protocol was initiated) for calculation of response rate.

²Used denominator of 1,399 (sample collection after protocol was initiated) for calculation of response rate.

³39 cases had inadequate tissue for pathologic diagnosis but were considered malignant on basis of clinical manifestations.

⁴Diagnosed at a non-study facility (n=60) or pathology obtained from procedure other than study intake core biopsy (e.g., fine needle aspirate, excisional biopsy, mastectomy) (n=21)

⁵Includes 33 patients whose lump was impalpable or too small to biopsy (n=33), 1 patient with a mass too tender to biopsy, and 19 patients who refused a biopsy.