Datasets:

electricsheepafrica
/

breast-cancer-screening

id int64	age_years int64	sex string	menopausal_status string	parity int64	age_at_first_birth int64	breastfeeding_months int64	rural int64	education_level string	family_history_breast_cancer int64	bmi float64	obese int64	hiv_positive int64	oral_contraceptive_use int64	alcohol_use int64	self_breast_exam int64	clinical_breast_exam int64	detection_method string	symptom_to_presentation_months float64	traditional_medicine_first int64	presentation_to_diagnosis_weeks int64	stage string	tumour_size_cm float64	grade int64	lymph_node_positive int64	metastatic int64	er_positive int64	pr_positive int64	her2_positive int64	molecular_subtype string	histology string	surgery_performed int64	surgery_type string	endocrine_therapy int64	alive_at_2_years int64	recurrence int64
1	51	F	post	1	23	17	1	tertiary	0	24.4	0	0	0	0	0	0	self_palpation	1.2	0	3	II	1.6	2	0	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	1	0
2	73	F	post	3	17	7	1	none	0	21.8	0	0	0	0	0	0	incidental	10.8	0	3	III	7.4	1	1	0	0	0	0	triple_negative	invasive_lobular	1	mastectomy	0	1	1
3	37	F	pre	5	14	9	0	primary	0	30	1	1	0	0	0	0	self_palpation	10.7	1	25	II	1.4	3	1	0	1	1	0	luminal_B	invasive_ductal	1	mastectomy	1	0	0
4	55	F	post	3	18	11	1	none	0	21	0	0	0	0	0	0	self_palpation	11.6	1	1	III	6.5	2	0	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	0	0
5	35	F	pre	4	20	20	1	none	0	20.1	0	0	0	0	0	1	screening	5.4	0	2	III	6.8	3	1	0	1	1	0	luminal_B	invasive_ductal	1	mastectomy	0	1	0
6	27	F	pre	3	19	22	0	none	0	20.1	0	1	0	0	0	0	screening	2.4	0	6	I	1.1	2	0	0	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
7	51	F	post	6	20	9	1	none	0	26.9	0	0	0	0	1	0	self_palpation	28.8	1	5	II	1.7	1	1	0	1	1	1	her2_enriched	invasive_ductal	1	mastectomy	1	0	0
8	58	F	post	1	20	9	1	primary	0	32.7	1	0	0	0	0	1	self_palpation	5.7	0	3	II	0.5	3	1	0	1	0	0	luminal_B	invasive_ductal	1	mastectomy	0	0	0
9	41	F	pre	2	19	1	1	none	0	20.5	0	0	1	0	1	0	self_palpation	0.9	0	3	III	3.3	1	1	0	1	1	0	luminal_A	invasive_ductal	1	mastectomy	0	0	0
10	39	F	pre	4	19	24	1	primary	1	20.4	0	0	1	1	0	0	screening	25.5	0	20	I	1.5	3	0	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	1	0
11	51	F	post	7	14	17	1	primary	0	24.3	0	0	0	0	0	0	clinical_exam	7.6	0	1	IV	3.6	3	0	1	1	1	1	her2_enriched	invasive_ductal	0	none	1	0	0
12	41	F	pre	7	22	7	0	primary	0	22.6	0	0	0	0	0	0	clinical_exam	18.2	0	18	I	0.5	1	0	0	0	0	0	triple_negative	invasive_lobular	1	mastectomy	0	0	0
13	50	F	post	4	16	11	1	none	0	20.7	0	0	0	0	0	0	self_palpation	8.8	0	3	IV	5.6	2	1	1	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
14	28	F	pre	2	21	15	0	none	0	26.3	0	0	0	0	0	0	self_palpation	9	1	7	I	1.2	3	0	0	1	1	1	her2_enriched	invasive_ductal	0	none	1	0	0
15	39	F	pre	5	18	13	0	secondary	1	22.2	0	0	0	0	0	0	clinical_exam	3.1	1	14	III	3.9	1	0	0	0	0	1	her2_enriched	invasive_ductal	1	breast_conserving	0	0	0
16	53	F	post	3	21	14	0	primary	0	31.3	1	0	0	0	0	0	self_palpation	2	1	4	IV	6.6	2	1	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
17	61	F	post	2	21	9	0	secondary	0	24.3	0	0	0	0	0	0	incidental	8.3	0	8	II	0.5	3	1	0	1	0	1	her2_enriched	invasive_ductal	1	mastectomy	1	0	0
18	43	F	pre	0	-1	0	0	primary	0	22.4	0	0	0	0	0	0	clinical_exam	9.1	0	21	III	6.7	2	1	0	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
19	45	F	pre	6	18	20	0	primary	0	24.2	0	0	0	0	0	0	self_palpation	12.8	1	40	IV	5.5	3	1	1	1	1	0	luminal_B	invasive_lobular	0	none	0	0	0
20	46	F	pre	3	16	5	1	primary	0	21.6	0	0	0	0	0	0	self_palpation	33.2	0	3	III	6.5	3	1	0	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
21	20	F	pre	1	18	5	1	secondary	0	21.8	0	0	0	0	0	0	self_palpation	20.3	1	12	II	0.5	2	0	0	1	1	0	luminal_A	other	0	none	1	1	0
22	54	F	post	1	20	3	0	secondary	0	29.6	0	1	0	0	1	0	clinical_exam	0.8	0	17	III	1.2	2	0	0	1	1	0	luminal_A	invasive_ductal	0	none	1	1	0
23	54	F	post	1	22	24	1	primary	0	29.1	0	0	0	0	0	0	self_palpation	4.2	1	1	IV	8.4	2	0	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
24	28	F	pre	4	17	0	1	secondary	0	19.4	0	0	0	0	0	0	clinical_exam	1.4	0	9	II	1	3	1	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	0	0
25	38	F	pre	2	14	6	1	primary	0	24.8	0	0	0	0	1	0	self_palpation	2	1	14	III	3.6	2	1	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	0	0
26	36	F	pre	6	21	16	1	primary	0	26.3	0	1	0	1	1	1	self_palpation	15.6	1	30	I	3.9	3	0	0	1	0	0	luminal_B	invasive_ductal	0	none	1	0	0
27	69	F	post	6	16	17	0	secondary	0	29.2	0	0	1	0	1	0	clinical_exam	19.8	0	4	II	2	2	0	0	1	1	0	luminal_A	invasive_ductal	1	breast_conserving	0	1	0
28	48	F	pre	3	15	11	1	primary	0	28	0	0	1	0	0	0	clinical_exam	28.7	0	14	IV	5.7	3	1	1	1	1	0	luminal_B	invasive_ductal	0	none	1	0	0
29	43	F	pre	4	21	5	1	none	0	27.6	0	0	0	0	0	0	clinical_exam	5.5	0	3	IV	4.5	3	1	1	1	1	1	her2_enriched	other	0	none	0	0	0
30	49	F	pre	4	32	17	1	secondary	0	23.6	0	0	0	1	1	0	self_palpation	17.8	1	20	III	3.3	3	1	0	1	1	0	luminal_B	other	1	mastectomy	1	1	1
31	46	F	pre	3	20	17	0	tertiary	1	27.4	0	0	0	0	0	0	self_palpation	7.2	1	4	III	2.9	2	1	0	0	0	0	triple_negative	other	1	breast_conserving	0	1	1
32	35	F	pre	2	21	15	1	secondary	0	33.2	1	0	0	0	0	0	clinical_exam	5.8	0	3	III	6.2	2	0	0	1	0	1	her2_enriched	invasive_ductal	1	mastectomy	1	1	0
33	58	F	post	4	24	13	1	none	0	27.9	0	0	0	0	0	1	self_palpation	26.7	0	5	I	2.3	2	0	0	0	0	1	her2_enriched	other	1	mastectomy	0	1	0
34	44	F	pre	3	20	15	1	secondary	0	23.9	0	0	0	0	1	0	incidental	0.6	0	36	IV	5.4	3	1	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
35	57	F	post	4	20	16	0	primary	0	29.2	0	0	1	0	0	1	self_palpation	2	0	25	IV	6.1	2	1	1	1	1	0	luminal_A	invasive_ductal	0	none	0	0	0
36	21	F	pre	4	19	18	0	primary	0	28.4	0	0	0	0	0	0	self_palpation	5.5	0	8	III	4.9	3	0	0	0	0	0	triple_negative	invasive_lobular	0	none	0	0	0
37	31	F	pre	6	20	14	1	primary	0	33.3	1	0	0	1	0	0	incidental	4.1	0	5	IV	4.2	2	1	1	0	0	0	triple_negative	other	1	mastectomy	0	0	0
38	49	F	pre	3	14	2	1	primary	0	26	0	0	0	0	0	1	clinical_exam	8.2	0	10	III	7	2	1	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	0	0
39	34	F	pre	3	20	12	1	none	0	21.1	0	1	1	0	1	0	incidental	22	1	14	IV	8.8	2	1	1	1	0	0	luminal_A	invasive_lobular	0	none	1	0	0
40	41	F	pre	4	22	14	1	none	0	26.9	0	0	0	0	0	0	screening	12	1	34	IV	4	3	0	1	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
41	46	F	pre	2	19	2	1	primary	0	28.1	0	0	0	1	1	0	incidental	12.9	1	11	IV	7.5	2	1	1	1	1	0	luminal_A	invasive_ductal	0	none	1	0	0
42	46	F	pre	2	17	7	1	primary	0	30.4	1	0	0	1	1	1	clinical_exam	0.7	0	12	II	3.6	1	0	0	1	0	0	luminal_A	invasive_lobular	1	breast_conserving	1	1	0
43	49	F	pre	4	16	12	1	none	0	32.4	1	0	0	0	0	0	incidental	4.4	0	16	III	6.6	3	1	0	1	1	1	her2_enriched	invasive_ductal	0	none	1	1	0
44	42	F	pre	3	19	6	0	primary	0	33.7	1	0	0	0	1	1	clinical_exam	17.6	1	26	III	6.1	3	1	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	0	0
45	22	F	pre	4	23	2	0	none	0	26.3	0	0	1	0	0	0	clinical_exam	4.4	0	6	IV	4.6	2	1	1	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
46	38	F	pre	2	19	2	1	primary	0	18.1	0	0	0	1	0	0	incidental	19.2	1	5	III	6.9	1	1	0	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
47	46	F	pre	3	22	4	1	none	0	28.3	0	0	0	0	0	1	screening	2.3	1	8	IV	7.9	3	0	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
48	50	F	post	4	25	19	1	primary	0	17.2	0	0	1	0	0	0	clinical_exam	1.3	1	40	III	7.2	3	1	0	1	1	1	her2_enriched	invasive_ductal	1	breast_conserving	0	0	0
49	54	F	post	3	28	2	0	primary	0	37.1	1	0	0	0	0	0	self_palpation	14.4	0	10	IV	7.5	3	1	1	1	1	0	luminal_B	invasive_ductal	0	none	0	0	0
50	61	F	post	2	21	3	1	secondary	1	37.6	1	0	0	1	0	0	clinical_exam	7.2	0	21	III	6.7	3	0	0	1	1	0	luminal_B	invasive_ductal	0	none	1	1	0
51	26	F	pre	4	24	11	0	secondary	0	36.5	1	0	0	0	0	0	clinical_exam	11.6	1	8	III	4.8	2	1	0	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
52	56	F	post	1	17	8	1	none	0	28.5	0	0	0	0	1	0	self_palpation	8.6	1	8	IV	2.1	3	1	1	0	0	0	triple_negative	invasive_lobular	0	none	0	0	0
53	45	F	pre	0	-1	0	1	primary	0	30.9	1	0	1	0	0	0	incidental	11.4	0	13	IV	5.5	2	1	1	1	1	1	her2_enriched	invasive_ductal	0	none	1	0	0
54	40	F	pre	2	23	16	1	tertiary	0	21.9	0	0	0	0	0	0	self_palpation	0.5	0	11	IV	3.5	1	1	1	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
55	39	F	pre	3	14	0	1	none	0	19.1	0	0	0	0	0	0	incidental	6.1	0	21	III	3.2	2	1	0	1	0	0	luminal_A	invasive_lobular	1	mastectomy	1	1	0
56	54	F	post	9	14	13	1	none	0	29.8	0	0	0	0	1	1	incidental	17	0	29	IV	8.2	3	1	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
57	42	F	pre	5	14	12	1	primary	0	22.5	0	0	0	0	0	0	clinical_exam	49.8	0	24	IV	9.6	3	1	1	1	0	0	luminal_B	invasive_lobular	0	none	0	0	0
58	53	F	post	3	14	17	0	secondary	1	18.5	0	0	0	1	0	0	self_palpation	12	0	1	III	3.2	3	0	0	1	1	0	luminal_B	invasive_ductal	1	mastectomy	0	0	0
59	49	F	pre	0	-1	0	1	primary	0	27.3	0	0	0	0	0	1	screening	19.6	0	5	III	8.1	2	1	0	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
60	48	F	pre	4	19	11	1	secondary	0	30.6	1	0	0	0	1	0	incidental	2.3	0	22	IV	5	2	1	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
61	68	F	post	8	15	12	0	secondary	0	20.7	0	0	0	0	0	0	self_palpation	24.2	0	9	III	8.2	3	1	0	1	1	0	luminal_B	invasive_ductal	1	mastectomy	0	0	0
62	62	F	post	6	14	13	1	none	1	27.4	0	0	0	0	1	0	self_palpation	8.3	0	12	IV	2.2	3	1	1	0	0	0	triple_negative	other	0	none	0	0	0
63	47	F	pre	4	18	15	0	primary	0	16	0	0	0	0	0	0	screening	22.8	1	18	III	6.4	2	1	0	1	1	1	her2_enriched	invasive_ductal	0	none	1	1	0
64	48	F	pre	1	18	15	1	secondary	0	29.4	0	1	0	0	1	0	self_palpation	10.7	1	12	III	7.4	3	1	0	1	1	0	luminal_B	invasive_ductal	0	none	1	0	0
65	69	F	post	6	14	16	1	secondary	1	16	0	0	0	0	0	1	self_palpation	20.8	1	10	III	5.1	3	0	0	1	0	1	her2_enriched	other	0	none	1	0	0
66	42	F	pre	4	16	15	1	secondary	0	16	0	0	0	0	1	0	incidental	4.2	0	9	II	3.7	2	1	0	1	0	0	luminal_A	invasive_ductal	0	none	1	0	0
67	39	F	pre	2	14	12	0	tertiary	0	17	0	0	0	0	0	0	self_palpation	14.7	0	23	IV	5.4	2	0	1	1	1	1	her2_enriched	invasive_ductal	1	mastectomy	1	0	0
68	45	F	pre	3	20	22	1	secondary	0	27.1	0	0	0	0	0	0	self_palpation	0.8	0	9	III	6.8	3	1	0	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
69	41	F	pre	8	18	8	1	none	0	31.6	1	1	0	0	0	0	self_palpation	4.4	1	1	III	7.2	3	1	0	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
70	54	F	post	0	-1	0	1	primary	0	23.5	0	0	1	0	0	0	clinical_exam	1.2	0	7	III	3.2	3	1	0	1	0	0	luminal_B	invasive_ductal	1	mastectomy	1	0	0
71	48	F	pre	5	18	1	0	secondary	0	34.6	1	0	0	0	0	1	incidental	2.7	1	4	III	4.9	2	1	0	1	1	0	luminal_A	invasive_ductal	1	mastectomy	0	0	0
72	57	F	post	3	18	8	0	secondary	0	26.7	0	0	0	0	0	1	screening	14.1	1	1	II	4.8	3	1	0	1	1	1	her2_enriched	invasive_ductal	1	mastectomy	1	0	0
73	49	F	pre	4	23	15	1	primary	0	25.9	0	0	0	0	0	0	screening	9	0	39	III	7.7	3	1	0	1	0	1	her2_enriched	invasive_ductal	0	none	1	0	0
74	59	F	post	3	20	11	0	none	0	27.1	0	0	0	0	0	0	self_palpation	7.5	0	12	III	2.6	3	1	0	1	1	0	luminal_B	invasive_ductal	0	none	1	0	0
75	54	F	post	5	18	24	0	none	0	17.3	0	0	0	0	0	0	self_palpation	5.1	1	2	IV	5.6	2	1	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
76	42	F	pre	4	22	9	0	tertiary	0	34.9	1	0	0	0	0	0	clinical_exam	3.1	0	22	I	2.3	2	0	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	0	0
77	36	F	pre	1	19	11	1	primary	0	22	0	0	0	1	0	1	self_palpation	17.5	0	7	III	8.1	2	1	0	1	1	0	luminal_A	other	1	mastectomy	1	1	1
78	55	F	post	3	14	9	1	none	0	30.5	1	0	0	0	0	0	self_palpation	3	0	2	IV	7.4	2	1	1	1	1	1	her2_enriched	invasive_ductal	0	none	0	1	0
79	78	F	post	2	17	10	1	secondary	0	23.8	0	0	0	0	0	0	incidental	0.5	0	28	IV	5.4	2	1	1	1	1	0	luminal_A	invasive_ductal	0	none	1	0	0
80	21	F	pre	6	20	17	0	none	0	25.8	0	1	0	1	0	1	self_palpation	7.8	0	1	IV	5.6	2	1	1	0	0	0	triple_negative	invasive_lobular	0	none	0	0	0
81	33	F	pre	0	-1	0	1	primary	0	33.9	1	0	0	0	0	1	self_palpation	10.7	1	1	IV	9.2	3	1	1	1	1	0	luminal_B	invasive_lobular	0	none	0	0	0
82	41	F	pre	5	17	2	0	primary	0	16.2	0	0	0	0	0	1	self_palpation	10.3	0	37	IV	4.6	3	1	1	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
83	41	F	pre	2	26	1	0	secondary	0	22.3	0	0	0	0	0	0	self_palpation	3.7	1	25	III	3	2	0	0	1	0	0	luminal_A	invasive_ductal	1	breast_conserving	1	1	0
84	48	F	pre	5	16	16	0	primary	1	23.7	0	0	0	1	0	0	self_palpation	8.7	0	7	III	3.5	3	1	0	1	1	0	luminal_B	invasive_ductal	1	mastectomy	0	0	0
85	42	F	pre	4	22	6	0	secondary	0	29.8	0	1	0	0	0	1	self_palpation	1.9	0	13	III	6	3	1	0	1	1	0	luminal_B	invasive_ductal	1	breast_conserving	1	0	0
86	54	F	post	4	24	14	0	secondary	0	27.8	0	0	0	1	0	0	self_palpation	6.3	0	12	IV	5.6	3	1	1	0	0	1	her2_enriched	invasive_lobular	1	mastectomy	0	0	0
87	60	F	post	2	24	15	0	secondary	0	31.2	1	0	1	0	0	0	clinical_exam	1	0	1	IV	2.5	3	1	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0
88	22	F	pre	5	25	20	0	secondary	0	34.4	1	0	0	0	0	0	self_palpation	0.5	0	20	III	4.4	3	1	0	0	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
89	53	F	post	5	20	20	0	secondary	0	36.8	1	0	0	0	0	0	self_palpation	3.1	1	17	III	4.2	3	0	0	1	1	0	luminal_B	invasive_ductal	1	mastectomy	1	0	0
90	47	F	pre	5	16	21	1	secondary	0	27.1	0	0	0	0	0	0	self_palpation	18.3	0	18	II	3.4	3	1	0	1	0	0	luminal_B	invasive_ductal	1	mastectomy	0	1	0
91	67	F	post	2	21	26	1	none	0	32.4	1	0	0	1	0	0	incidental	2	0	2	IV	6.2	2	0	1	1	1	0	luminal_A	invasive_ductal	0	none	1	0	0
92	52	F	post	7	22	1	0	none	0	31	1	0	0	0	1	0	clinical_exam	24.4	1	36	II	3	3	0	0	0	0	1	her2_enriched	invasive_ductal	1	breast_conserving	0	1	0
93	52	F	post	0	-1	0	1	secondary	0	29.5	0	0	0	0	0	1	self_palpation	3.4	0	4	IV	4.8	3	0	1	1	0	1	her2_enriched	invasive_ductal	0	none	0	0	0
94	47	F	pre	3	16	10	0	primary	1	29.2	0	0	0	0	1	0	self_palpation	6.5	1	5	III	7.3	2	1	0	1	0	0	luminal_A	invasive_ductal	1	mastectomy	0	0	0
95	69	F	post	5	23	17	0	secondary	0	23.9	0	0	1	0	0	0	self_palpation	0.5	1	25	III	4.8	3	1	0	0	0	0	triple_negative	invasive_ductal	1	mastectomy	0	0	0
96	54	F	post	3	22	8	1	none	0	21.1	0	0	1	0	1	0	self_palpation	4.8	1	10	III	3.1	3	1	0	1	1	1	her2_enriched	other	1	mastectomy	1	0	0
97	71	F	post	0	-1	0	0	none	0	30.9	1	0	0	0	1	0	self_palpation	3.3	0	1	II	0.5	2	0	0	0	0	0	triple_negative	invasive_ductal	1	breast_conserving	0	1	0
98	66	F	post	3	20	9	1	primary	0	22.1	0	0	0	0	0	0	clinical_exam	3.4	0	1	III	1.5	2	0	0	1	1	0	luminal_A	invasive_ductal	0	none	0	0	0
99	51	F	post	5	20	9	1	primary	0	25.5	0	0	0	0	1	0	self_palpation	3.9	0	18	III	4.9	3	1	0	0	0	0	triple_negative	invasive_lobular	1	mastectomy	0	0	0
100	47	F	pre	0	-1	0	1	none	0	35.2	1	0	1	0	0	0	incidental	2.9	0	6	IV	4.5	3	1	1	0	0	0	triple_negative	invasive_ductal	0	none	0	0	0

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Breast Cancer Screening & Late Presentation Dataset

Abstract

This dataset provides 30,000 simulated breast cancer records (10,000 per scenario) of women diagnosed with breast cancer across sub-Saharan African settings. Each record contains 40+ variables including demographics, risk factors, screening history, tumour characteristics (stage, grade, receptor status, molecular subtype), treatment cascade, and survival. Three settings: cancer centre (43% 2yr survival), regional hospital (27%), and rural facility (14%).

1. Introduction

Breast cancer is the leading cancer diagnosis in African women, with age-standardised incidence of 33/100K and mortality 17/100K (GLOBOCAN 2022). In SSA, 77% of patients present at stage III/IV compared to <30% in HICs. Five-year survival is ~~40% in SSA vs ~90% in high-income countries. Triple-negative breast cancer is disproportionately common (~~27-37%) in African populations. Mammography screening is virtually absent; clinical breast examination is the primary screening tool.

This dataset is entirely simulated. It must not be used for clinical decision-making.

2. Methodology

2.1 Parameterization

Parameter	Value	Source
Incidence (SSA)	33/100K	GLOBOCAN 2022
Stage III/IV at diagnosis	77%	Jedy-Agba et al., 2016
5-year survival (SSA)	~40-52%	Limenih et al., JAMA 2024
Median age at diagnosis	48 years	Sayed et al., 2019
TNBC prevalence	27-37%	Eng et al., 2014
Mammography ever (SSA)	~5%	Black & Richmond, 2019
Radiotherapy centres (SSA)	~30	Stefan, 2015

2.2 Scenario Design

Scenario	Facility	Surgery	Chemo	Radio	2yr Survival
Cancer centre	Comprehensive	55%	62%	35%	43%
Regional hospital	Basic surgery	51%	0%	0%	27%
Rural facility	Referral only	0%	0%	0%	14%

3. Schema

Column	Type	Description
id	int	Unique identifier
age_years	int	Patient age
menopausal_status	categorical	pre / post
parity	int	Number of pregnancies
education_level	categorical	none / primary / secondary / tertiary
family_history_breast_cancer	binary	Family history
bmi	float	Body mass index
hiv_positive	binary	HIV status
self_breast_exam	binary	Self-exam practice
clinical_breast_exam	binary	CBE performed
mammography_ever	binary	Ever had mammography
detection_method	categorical	self_palpation / clinical_exam / incidental / screening
symptom_to_presentation_months	float	Delay (months)
traditional_medicine_first	binary	Traditional medicine before facility
stage	categorical	I / II / III / IV
tumour_size_cm	float	Tumour size
grade	int	Histological grade 1-3
lymph_node_positive	binary	Lymph node involvement
metastatic	binary	Distant metastasis
er_positive	binary	Estrogen receptor
pr_positive	binary	Progesterone receptor
her2_positive	binary	HER2 status
molecular_subtype	categorical	luminal_A / luminal_B / her2_enriched / triple_negative
receptor_tested	binary	Receptor testing done
histology	categorical	invasive_ductal / invasive_lobular / medullary / other
surgery_performed	binary	Surgery done
surgery_type	categorical	mastectomy / breast_conserving / none
chemotherapy_received	binary	Chemotherapy
chemotherapy_completed	binary	Completed full course
radiotherapy_received	binary	Radiotherapy
endocrine_therapy	binary	Endocrine therapy
trastuzumab	binary	Trastuzumab (HER2)
treatment_abandoned	binary	Treatment abandoned
alive_at_2_years	binary	2-year survival
recurrence	binary	Recurrence

4. Validation

Validation Report

Key validation checks:

Late stage: 60% → 77% → 85% across settings ✓
TNBC: ~36% consistent with African populations ✓
Survival gradient: 43% → 27% → 14% ✓
Median age: ~48 years (younger than HICs) ✓
Traditional medicine delay: Associated with later stage ✓
Treatment cascade: Surgery + chemo improve survival ✓

5. Usage

from datasets import load_dataset
dataset = load_dataset("electricsheepafrica/breast-cancer-screening", "regional_hospital")
df = dataset["train"].to_pandas()

python generate_dataset.py --all-scenarios --n 10000 --seed 42

6. Limitations

Simulated: Not derived from real cancer registries.
No imaging: No mammograms or ultrasound data.
No genomics: No BRCA1/2 or full molecular profiling.
Snapshot: No longitudinal follow-up beyond 2 years.
Women only: Male breast cancer not modelled.

7. References

GLOBOCAN (2022). Breast cancer incidence and mortality.
Jedy-Agba E, et al. (2016). Stage at diagnosis SSA. Lancet Glob Health, 4(12):e923.
Sayed S, et al. (2019). Breast cancer in SSA. Breast, 48:S39.
Eng A, et al. (2014). TNBC in African populations. Int J Cancer, 135(8):1908.
Black E, Richmond R (2019). Mammography in SSA. Glob Health, 15:3.
Stefan DC (2015). Radiotherapy access in Africa. ecancermedicalscience, 9:526.
Limenih MA, et al. (2024). Breast cancer survival SSA. JAMA Netw Open, 7(5):e2410260.

Citation

@dataset{esa_breast_cancer_2025,
  title={Breast Cancer Screening and Late Presentation Dataset},
  author={Electric Sheep Africa},
  year={2025},
  publisher={Hugging Face},
  url={https://huggingface.co/datasets/electricsheepafrica/breast-cancer-screening}
}

License

CC-BY-4.0

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