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Table 3 Pearson correlation; Spearman rank correlation; and Kappa statistics of the relationship between the asset-based wealth index and the various night time lights metrics for 338 Administrative 1 level units in 37 countries in Africa.

From: Using remotely sensed night-time light as a proxy for poverty in Africa

 

Pearson* Correlation

Spearman's* rank correlation

Kappa coefficient (95% CI)

Mean brightness of NTL

0.64

0.79

0.64 (0.70, 0.58)

Proportion of area covered by NTL

0.63

0.74

0.58 (0.63, 0.51)

Mean distance (km) to NTL

-0.61

-0.62

0.42 (0.49, 0.35)

  1. The Pearson and Spearman's correlations assess the relationships between the asset-based wealth index and the night time lights metrics in the continuous and the categorical (quintiles) forms, respectively. CI = confidence interval
  2. *Correlations are significant at the 0.01 level (2-tailed)
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Population Health Metrics

ISSN: 1478-7954