Table 1 Results of risk of bias assessment using the adjusted QUIPS-tool
From: Inflammatory biomarkers in patients with sciatica: a systematic review
Cross sectional studies | |||||
|---|---|---|---|---|---|
|  | Participation | Attrition | Prognostic Factor | Outcome | Risk of bias: + = high +/− = moderate - = low |
Piperno 1997 [16] | Moderate | Moderate | Low | Moderate | +/− |
Brisby [17] | High | Low | Low | Moderate | +/− |
Sugimori [18] | High | Low | Moderate | Low | +/− |
Cheng [19] | Moderate | Low | Low | Moderate | +/− |
Xue [20] | Moderate | Low | Low | Moderate | +/− |
Peng [21] | Moderate | Low | Moderate | Low | – |
Palada [22] | Low | Low | Low | Low | – |
Longitudinal studies | |||||
Schistadt [15] | Low | Moderate | Low | Low | – |
Stürmer [23] | Low | Moderate | Low | Low | – |
Andrade [24] | High | Low | Low | Moderate | +/− |
Andrade [25] | High | Low | Low | Moderate | +/− |
Pedersen [26] | Low | High | Low | Moderate | +/− |
Wang [27] | Low | Low | Low | Moderate | – |
Moen [28] | Low | Moderate | Low | Low | – |
Zu [29] | Low | Moderate | Low | Low | – |
Chen [30] | Moderate | Moderate | Low | Moderate | +/− |