Geospatial analysis of cholera outbreak in Lusaka, Zambia, between 2023 and 2024

Table 1 Space–time scan statistics of cholera cases in Lusaka District, 2023–2024

Cluster	Townships	Number of townships	Duration	p	LLR*	Radius (km)	Observed	Expected	O/E**	RR***
Epidemiologic week 41–44 (2023)
1	Bauleni	2	Oct 29–Nov 4	< 0.001	27.309486	2.1	11	0.38	29.2	34.2
2	Chilenje	7	Oct 22–Oct 28	< 0.001	17.375077	1.98	10	0.74	13.48	15.46
Epidemiologic week 45–48 (2023)
1	Matero North	1	Nov 19–Nov 25	< 0.001	118.310812	0	27	0.13	200.59	234.48
2	Mass Media	48	Nov 19–Nov 25	< 0.001	14.240036	5.79	0	13.71	0	0
3	New Kasama	2	Nov 5–Nov 11	< 0.001	13.910586	5.63	10	1.04	9.63	10.12
Epidemiologic week 49–52 (2023)
1	Matero North	1	Dec 24–Dec 30	< 0.001	169.293172	0	48	0.54	88.55	94.55
2	Golf Course	41	Dec 3–Dec 9	< 0.001	39.615821	6.35	3	49.51	0.061	0.057
3	Kanyama	1	Dec 24–Dec 30	< 0.001	33.768203	0	66	20.22	3.26	3.48
4	Chawama	10	Dec 24–Dec 30	< 0.001	20.894636	2.7	2	27.7	0.072	0.07
Epidemiologic week 1–4 (2024)
1	Garden Park	8	Jan 15–Jan 21	< 0.001	204.9501	4.55	406	129.15	3.14	3.56
2	Matero North	1	Jan 15–Jan 21	< 0.001	133.412344	0	54	1.75	30.81	31.47
3	John Howard	17	Jan 22–Jan 28	< 0.001	87.703035	4.34	9	117.4	0.077	0.073
4	Foxdale	23	Jan 15–Jan 21	< 0.001	85.747024	6.66	23	148.35	0.16	0.15
5	Kalikiliki	1	Jan 8–Jan 14	< 0.001	35.959176	0	30	3.79	7.91	7.99
Epidemiologic week 5–8 (2024)
1	Matero North	1	Feb 5–Feb 11	< 0.001	96.094022	0	30	0.47	64.37	67.47
2	Bauleni	2	Feb 12–Feb 18	< 0.001	63.90688	2.1	40	3.32	12.04	12.77
3	Rhodes Park	45	Feb 19–Feb 25	< 0.001	49.345321	5.67	0	47.5	0	0
4	Kanyama	1	Jan 29–Feb 4	< 0.001	48.650669	0	71	17.38	4.08	4.47
Epidemiologic week 9–12 (2024)
1	Bauleni	18	Feb 26–Mar 4	< 0.001	31.215855	6.25	23	1.83	12.55	27.32
2	Matero North	1	Feb 26–Mar 4	< 0.001	22.210034	0	6	0.033	183.26	214.5

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