How to Interpret Spearman's Rank Correlation Coefficient?
The value of Spearman's rank correlation coefficient ranges from -1 to +1. A coefficient of +1 indicates a perfect positive association between the ranks, -1 indicates a perfect negative association, and 0 indicates no association. In epidemiological research, the strength of the association can be interpreted as follows:
0 to 0.19: Very weak 0.20 to 0.39: Weak 0.40 to 0.59: Moderate 0.60 to 0.79: Strong 0.80 to 1.0: Very strong
