Table 3.
Points acquired in the assessment of quality for each study according to the Newcastle–Ottawa quality assessment scale criteria
| Study Loneliness |
Representativeness | Selection | Comparability On the basis of design or analysis |
Outcome | Total | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Non-exposed cohort | Ascertainment of exposure | Outcome of interest not present at start | Assessment of outcome | Follow-up long enough | Adequacy of follow-up | |||||||||||||
| Aguiar et al. (2020) | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 0 | 7 | |||||||||
| Conde-Sala et al. (2020) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Drageset et al. (2012) | 0 | 1 | 1 | 0 | 2 | 1 | 1 | 1 | 7 | |||||||||
| Ellwardt et al. 2015 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Elovainio et al. (2017) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Holwerda et al. (2016) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Holwerda et al. (2012) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 8 | |||||||||
| Hoogendijk et al. (2020) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Iecovich et al. (2011) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Julsing et al. (2016) | 0 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 8 | |||||||||
| Jylha and Aro (1989) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Lara et al. (2020) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Luo and Waite (2014) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Ng et al. (2021) | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 0 | 7 | |||||||||
| Novak et al. (2020) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Olaya et al. (2017) | 0 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Olsen et al. (1991) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 8 | |||||||||
| O’Suilleabhain et al. (2019) | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 0 | 7 | |||||||||
| Perissinotto et al. (2012) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Schutter et al. (2020) | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 0 | 8 | |||||||||
| Steptoe et al. (2013) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Stessman et al. (2014) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 8 | |||||||||
| Sugisawa et al. (1994) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Tabue Teguo et al. (2016) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 9 | |||||||||
| Tanskanen et al. (2016) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Tilvis et al. (2011) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Wang et al. (2020) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Youm et al. (2021) | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 0 | 7 | |||||||||
| Networksize | ||||||||||||||||||
| Ali et al. (2018) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Cerhan and Wallace et al. (1997) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| DeBrito et al. (2017) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Ellwardt et al. 2015 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 | |||||||||
| Giles et al. (2005) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| McLaughlin et al. (2011) | 0 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 8 | |||||||||
| Roth (2020) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||
| Schutter et al. (2020) | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 1 | 8 | |||||||||
| Shye et al. (1995) | 0 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 8 | |||||||||
| Vogt et al. (1992) | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 | |||||||||