From:  Vaping, heated tobacco, and periodontal health: a systematic review of their effects on inflammation, microbiota, and non-surgical therapy response

 Bias assessment by the Robins tool.

Authors (year)D1D2D3D4D5D6D7Overall
Xu et al. (2021) [55]
Shah et al. (2023) [56]
Kumar et al. (2023) [57]
Holliday et al. (2019) [58]
Karaaslan et al. (2020) [59]
Kiiun et al. (2023) [60]
Akram et al. (2021) [61]
ArRejaie et al. (2019) [62]
ALHarthi et al. (2019) [63]
Mišković et al. (2024) [64]
Pouly et al. (2021) [65]
Al-Hamoudi et al. (2020) [66]

High: ; low: ; some concerns: ; no information: ; D1: bias due to confounding; D2: bias arising from the measurement of the exposure; D3: bias in the selection of participants into the study (or into the analysis); D4: bias due to post-exposure interventions; D5: bias due to missing data; D6: bias arising from the measurement of the outcome; D7: bias in the selection of the report result.