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Table 2 Seventeen significantly higher and lower than expected proportions of FBD spatial clusters

From: Why not? Understanding the spatial clustering of private facility-based delivery and financial reasons for homebirths in Nigeria

  ID Cluster location No. of wards circled No. of most recent births Observed number of private FBD Observed % private FBD Expected number of private FBD under H0 Relative risk+ p-value$
Latitude Longitude Radius (km)
High 1^ 6.7 3.7 97.2 75 1182 605 52.8 154 4.82 < 0.001
2 9.9 8.9 21.2 5 63 33 50.5 8 4.06 < 0.001
3 5.8 7.2 85.2 88 1199 569 48.9 156 4.38 < 0.001
4 6.7 5.4 78.7 28 457 146 32.9 60 2.54 < 0.001
5 8.5 4.6 132.5 67 1198 338 28.0 156 2.34 < 0.001
6 7.3 9.0 79.4 12 249 73 27.4 32 2.29 < 0.001
7 7.9 7.1 148.3 78 1200 295 25.3 156 2.00 < 0.001
Low 8 9.8 9.7 64.0 8 233 8 3.1 30 0.26 0.014
9 5.3 8.6 75.9 17 280 8 2.9 37 0.22 < 0.001
10 4.6 5.7 88.6 24 558 5 2.1 73 0.07 < 0.001
11 8.7 11.6 178.0 41 1187 22 1.8 155 0.14 < 0.001
12 10.8 7.3 155.6 38 1174 14 1.4 153 0.09 < 0.001
13 10.8 3.9 184.8 24 770 7 0.5 100 0.07 < 0.001
14 13.3 8.0 144.9 31 1201 1 0.1 156 0.01 < 0.001
15 12.0 12.5 208.5 46 1197 2 0.1 156 0.01 < 0.001
16 11.7 9.3 84.7 30 1085 1 0.1 141 0.01 < 0.001
17 13.2 5.5 145.6 36 1201 0 0.0 156 0.00 < 0.001
  1. FBD = facility based delivery; H0 = null hypothesis of spatial randomness
  2. $The likelihood ratio test is used for testing cluster significance
  3. ^Cluster 1 is the most likely cluster; all other clusters are non-overlapping secondary clusters
  4. +Relative risk of private FBD within cluster compared to the risk in all other areas