Table 5.
n | Mean rank | Sum of ranks | Z value | P value | |
---|---|---|---|---|---|
Number of reports | |||||
Negative ranks | 18a | 14.58 | 262.50 | −0.974b | .330 |
Positive ranks | 11c | 15.68 | 172.50 | ||
Ties | 2d | ||||
Signal strength using ROR | |||||
Negative ranks | 17a | 14.76 | 251.00 | −0.059b | .953 |
Positive ranks | 14c | 17.50 | 245.00 | ||
Ties | 0d | ||||
Signal strength using PRR | |||||
Negative ranks | 17a | 14.91 | 253.50 | −0.108b | .914 |
Positive ranks | 14c | 17.32 | 242.50 | ||
Ties | 0d |
Note. ROR = reporting odds ratio; PRR = proportional reporting ratio.
After < before.
Based on positive ranks.
After > before.
After = before.