Table 3.
List of all level A and B studies by type of study and quality rating3
| Type of study and references | Level of evidence | Grade |
|---|---|---|
| Sexual function | ||
| Secondary data from RCTs | 1++ | A |
| Kigozi et al 20,087 | ||
| Krieger et al 20,088 | ||
| Systematic reviews | 1+ | A |
| Morris & Krieger 201315 | ||
| Tian et al 201318 | ||
| Shabanzadeh et al20 | ||
| Yang et al 201819 | ||
| Meta-analyses | 1+ | A |
| Tian et al 201318 | ||
| Yang et al 201819 | ||
| Longitudinal cohort studies | 2++ | B |
| Nordstrom et al 201727 | ||
| Galukande et al201728 | ||
| Retrospective cohort studies | 2++ | B |
| Laumann et al 199730 | ||
| Mao et al 200821 | ||
| Ferris et al 201031 | ||
| Hoschke et al 201433 | ||
| Homfray et al 201535 | ||
| Chinkoyo & Pather 201536 | ||
| Jönsson et al 201537 | ||
| Collins et al 200238 | ||
| Fink et al 200241 | ||
| Senkul et al 200442 | ||
| Physiological measurements | 2++ | B |
| Waldinger et al 200551 | ||
| Waldinger et al 200953 | ||
| Alp et al 201455 | ||
| Xia et al 201658 | ||
| Penile sensitivity | ||
| Physiological measurements | 2++ | B |
| Bleustein et al 200559 | ||
| Payne et al 200760 | ||
| Bossio et al 201664 | ||
| Secondary data from RCT | 1++ | A |
| Krieger et al 20088 | ||
| Systematic Reviews | 1+ | A |
| Cox et al 201512 | ||
| Morris & Krieger 201315 | ||
| Shabadnazeh et al20 | ||
| Sexual satisfaction and pleasure | ||
| Randomized controlled trials | 1++ | A |
| Kigozi et al7 | ||
| Krieger et al8 | ||
| Systematic Reviews | 1++ | A |
| Morris & Krieger 201315 | ||
| Longitudinal cohort studies | 2++ | B |
| Zulu et al 201576 | ||
| Nordstrom et al 201727 | ||
| Brito et al24 |