Table 2.
Sample description of the analyzed papers.
| Paper | Sample Country | n | % men | Groups | n by group | % men by group | Age mean by group | Sampling | Matching |
|---|---|---|---|---|---|---|---|---|---|
| Anderson et al. (2013) | USA | 29 | 58.62 | 2 | DS: 15 C: 14 |
DS: 60.00 C: 57.14 |
DS: 20.20 C: 23.70 |
Accidental | Chronological age and sex |
| Anderson et al. (2015) | USA | 29 | 58.62 | 2 | DS: 15 C: 14 |
DS: 60.00 C: 57.14 |
DS: 20.20 C: 23.70 |
Accidental | Chronological age and sex |
| Jacola et al. (2011) | USA | 25 | 60.00 | 2 | DS: 13 C: 12 |
DS: 61.54 C: 58.33 |
DS: 18.30 C: 19.00 |
Accidental | Chronological age and sex |
| Jacola et al. (2014) | USA | 36 | 47.22 | 3 | DS: 11 C_CA: 13 C_MA: 12 |
DS: 54.54 C_CA: 53.85 C_MA: 33.33 |
DS: 18.3 C_CA: 18.3 C_MA: 5.4 |
Accidental | C_CA: chronological age C_MA: mental age |
| Reynolds Losin et al. (2009) | USA | 18 | 50.00 | 2 | DS: 9 C:9 |
DS: 44.44 C: 55.56 |
DS: 16.5 C: 17.8 |
Accidental | Chronological age |
| Seyffert et al. (2002) | USA | 6 | 2 | DS: 3 C: 3 |
Accidental | ||||
| Vega et al. (2015) | USA | 68 | 60.29 | 3 | DS: 10 WS: 18 C: 40 |
DS: 40 WS: 72.22 C: 60.00 |
DS: 38.98 WS: 25.89 C: 46.95 |
Accidental | |
| Wan et al. (2017) | Taiwan | 76 | 71.05 | 2 | DS: 38 C: 38 The DS group was divided in two samples: intervention (n = 18) and control (n =20) |
DS: 71.05C: 71.05 | DS: 13.17 C: 13.07 |
Accidental | Chronological age and sex |
| Wilson et al. (2019) | United Kingdom | 54 | 50.00 | 2 | DS: 34 C:20 |
DS: 55.00 C: 47.00 |
DS: 43.5 C_CA: 43.5 |
Accidental | Chronological age |
DS, Down syndrome group; C, control group; C_CA, control group matched by chronological age; C_MA, control group matched by mental age; WS, Williams syndrome group.