Table 5.
Comparison of the 50 most-cited versus 50 least-cited reviewsa
| Characteristics | Top 50 cited | Bottom 50 cited | P-value of difference |
|---|---|---|---|
| Number of citations (mean) |
132.0 (SD ±29.7) |
0.6 (SD ±0.5) |
<0.000 |
| JIF (mean) |
10.5 (SD ±8.89) |
2.3 (SD ±2.3) |
<0.000 |
| Number of authors (mean) |
6.3 (SD ±6.4) |
3.5 (SD ±2.2) |
0.004 |
| Number of pages (mean) |
12.5 (SD ±9.4) |
13.7 (SD ±27.9) |
0.790 |
| International collaboration |
24% |
8% |
0.029 |
| Published in journals with JIF |
100% |
50% |
<0.000 |
| Indexed in MEDLINE |
100% |
54% |
<0.000 |
| Top ICD-10 chapter |
16% ‘Neoplasms’ |
20% ‘Diseases of the respiratory system’ |
|
| Top intervention type |
40% ‘Not an intervention’ |
28% ‘Not an intervention’ |
|
| Top country location of first author | 48% United States | 34% United Kingdom |
aICD-10, International Statistical Classification of Diseases and Related Health Problems, 10th Revision; JIF, journal impact factor.