Table 3: Quality of study Stenhouse, et al.
| Support for judgement | Review authors' judgement | |
| Selection bias: Random sequence generation | Randomization was made with a specific program: Research randomizer form v4.0 | Low bias probability |
| Selection bias: Allocation concealment | Is it always done by the automatic program? Not clear | ? |
| Performance bias | No blinding of the patient referred to the treatment is described | High bias probability |
| Detection bias | No blinding of outcomes assessors is described | High bias probability |
| Attrition bias | Two patients with one injection of ACP and one with needling were excluded from the outcomes because they improved the pain after the first procedure (they did not repeat it after 1 month) | Bias probability (M?) |
| Reporting bias | No selective outcomes reporting are present | Low bias probability |
| Other sources of bias | No | Low bias probability |