Table 3 Type of relationship observed in the papers according to period of publication and region of origin
Type of relationship | Bivariate analysis (n: 134) | Multivariate analysis (n: 90) | ||
|---|---|---|---|---|
n | % | n | % | |
PERIOD OF PUBLICATION | ||||
1990–1997 | 6 | 100.0 | 5 | 100.0 |
Inverse relationship | 0 | 0.0 | 0 | 0.0 |
Absence of relationship | 2 | 33.3 | 2 | 40.0 |
Varies depending on another variable | 4 | 66.7 | 3 | 60.0 |
1998–2005 | 53 | 100.0 | 28 | 100.0 |
Inverse relationship | 33 | 62.3 | 15 | 53.6 |
Absence of relationship | 10 | 18.9 | 5 | 17.9 |
Varies depending on another variable | 10 | 18.9 | 7 | 25.0 |
Direct relationship | 0 | 0.0 | 1 | 3.6 |
2006–2013 | 75 | 100.0 | 57 | 100.0 |
Inverse relationship | 48 | 64.0 | 31 | 54.4 |
Absence of relationship | 13 | 17.3 | 11 | 19.3 |
Varies depending on another variable | 14 | 18.7 | 15 | 26.3 |
REGION | ||||
North America | 44 | 100.0 | 34 | 100.0 |
Inverse relationship | 27 | 61.4 | 20 | 58.8 |
Absence of relationship | 4 | 9.1 | 5 | 14.7 |
Varies depending on another variable | 13 | 29.5 | 9 | 26.5 |
Europe | 77 | 100.0 | 47 | 100.0 |
Inverse relationship | 46 | 59.7 | 24 | 51.1 |
Absence of relationship | 18 | 23.4 | 9 | 19.1 |
Varies depending on another variable | 13 | 16.9 | 13 | 27.7 |
Direct relationship | 0 | 0.0 | 1 | 2.1 |
Othera | 13 | 100.0 | 9 | 100.0 |
Inverse relationship | 8 | 61.5 | 2 | 22.2 |
Absence of relationship | 3 | 23.1 | 4 | 44.4 |
Varies depending on another variable | 2 | 15.4 | 3 | 33.3 |