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Table 1 Key cluster characteristics

From: The impact of improved water supply on cholera and diarrhoeal diseases in Uvira, Democratic Republic of the Congo: a protocol for a pragmatic stepped-wedge cluster randomised trial and economic evaluation

Cluster # Estimated population (March 2018) Area [km2] *Mean # suspected cholera cases per month *Mean monthly incidence per 1000 Existing pipe length [m] Pipe length to rehabilitate [m] Length of new pipes to install [m] # existing household connections # provisionally planned new household connections Number of planned new community taps Allocation sequence
1 4291 2.02 1.9 0.4 2152 57 2628 16 66 6 15
2 4990 0.76 6.0 1.2 1578 1658 1792 89 25 3 16
3 11,183 0.87 6.4 0.6 5574 1266 1864 171 25 7 10
4 7328 1.02 5.4 0.7 2347 0 3398 25 100 5 12
5 13,649 1.27 4.4 0.3 2786 797 4177 19 205 4 9
6 8389 0.48 5.8 0.7 1730 499 2328 43 82 6 13
7 7480 0.37 2.0 0.3 4525 367 1065 152 26 2 8
8 15,455 0.43 4.8 0.3 2961 1097 1793 199 25 5 7
9 3994 0.36 9.4 2.4 3848 189 2446 183 25 8 11
10 14,175 0.59 7.1 0.5 8901 692 1520 525 25 7 1
11 56,106 1.70 14.5 0.3 8775 1599 2401 633 254 16 5
12 12,462 0.99 3.0 0.2 2292 1455 1844 22 193 1 14
13 50,764 2.75 10.4 0.2 17,781 1666 1266 1384 24 11 4
14 16,175 0.55 6.7 0.4 907 0 2549 35 220 5 3
15 15,183 0.81 7.2 0.4 4091 135 2420 161 62 9 2
16 19,338 1.98 10.6 0.6 1788 2061 2874 28 318 20 6
Mean 16,310 1.06 6.6 0.4** 72,033 13,538 36,363 3685 1675 7.2
Minimum 3994 0.36 1.9 0.2 907 0 1065 16 25 1
Maximum 56,106 2.75 14.5 2.4 17,781 2061 4177 1384 318 20
  1. *Based on CTC admissions between January 1, 2009, and March 31, 2018, and population in March 2018
  2. **Mean weighted by cluster population size