Table 3 |
||||
|
Comparison of cluster 1 and cluster 2 studies (mean ± SD) |
||||
|
Characteristic |
Cluster 1 |
Cluster 2 |
p-value† |
|
|
|
||||
|
Study-related |
Publication date (months after first) |
38 ± 8 |
22 ± 17 |
0.05 |
|
Study size (number of patients) |
136 ± 106 |
75 ± 35 |
0.23 |
|
|
Jadad score (1–5) |
2.9 ± 1.5 |
2.0 ± 1.4 |
0.24 |
|
|
All three factors combined |
34 ± 13 |
50 ± 9 |
0.01 |
|
|
Patient-related |
Age (years) |
68 ± 4 |
70 ± 3 |
0.24 |
|
Baseline creatinine (mg/dl) |
1.6 ± 0.4 |
2.2 ± 0.6 |
0.09 |
|
|
Diabetes mellitus (%) |
43 ± 13 |
45 ± 13 |
0.93 |
|
|
Female (%) |
31 ± 14 |
22 ± 9 |
0.31 |
|
|
Contrast volume (ml) |
158 ± 61 |
122 ± 46 |
0.11 |
|
|
|
||||
|
† Wilcoxon rank sum test |
||||
|
Gonzales et al. BMC Medicine 2007 5:32 doi:10.1186/1741-7015-5-32 |
||||
