Table 1 Baseline chacteristics of enrolled studies
Study | Design | Number | Age (years) | Follow-up | area |
|---|---|---|---|---|---|
Fernandes, 2007 | Case control | KOA:75 Control: 40 | KOA:56.6 ± 7.6; Control: 53.8 ± 8.5 | NA | Brazil |
Senolt, 2005 | Case control | KOA:38 Control: 38 | KOA:64.1 ± 10.1; Control: 58.3 ± 9.1 | NA | USA |
Wakitani, 2007 | Case control | KOA:31 Control: 24 | KOA:20–80; Control: 23–52 | NA | Japan |
Li, 2012 | Case control | KOA:115 Control: 35 | KOA:55 ± 13.2; Control:53 ± 12.53 | 2–3 years | China |
Engstrom, 2009 | population-based cohort | 5171 | 57.5 + 5.9 | 12.4 years | Sweden |
Zhang, 2015 | Case control | Control: 20 KOA: 20 | Control:56.3 ± 7.9; KOA: 59.2 ± 8.3 | NA | China |
Sowers, 2002 | cohort | 1025 | 42.9 ± 0.1 | 2.5 years | USA |
Kerkhof,2010 | Case control | KOA: 210; Control: 1360 | ≥55 years | NA | Netherlands |
Haghighian,2014 | Case control | 23 | 58.27 ± 7.84 | 2 months | Iran |
Ramirez, 2014 | cohort | 186 | 61 ± 7.3 | 2 years | Netherlands |
Nielsen, 2014 | Case control | 281 | 40–80 | NA | Denmark |
Scorei, 2011 | Case control | 15 | 67.6 (5.5) | 2 weeks | Romania |
Stannus, 2012 | cohort study | KOA:35; Control:114 | KOA:63.2 ± 6.9 Control: 61.5 ± 6.7 | 5 years | Australia |
Hosnijeh, 2016 | population-based prospective cohort | 1335 | 65.2 (8.43) | 5-year | Netherlands |