|
Cohort study
|
|
Wedderkopp et al. [47]
|
+
|
+
|
?
|
+
|
+
|
+
|
+
|
+
|
+
| |
+
|
−
|
+
|
+
|
+
|
+
|
+
|
14/16 (88)
|
|
van den Heuvel et al. [41]
|
+
|
−
|
+
|
?
|
−
|
−
|
−
|
+
|
−
| |
+
|
+
|
+
|
+
|
+
|
+
|
+
|
10/16 (62)
|
|
Mikkelsson et al. [33]
|
+
|
+
|
−
|
−
|
−
|
−
|
+
|
+
|
−
| |
+
|
−
|
−
|
+
|
+
|
+
|
+
|
9/16 (56)
|
|
Picavet and Schuit [37]
|
+
|
−
|
−
|
−
|
+
|
−
|
−
|
+
|
−
| |
+
|
−
|
?
|
+
|
+
|
+
|
+
|
8/16 (50)
|
|
Hartvigsen and Christensen [17]
|
+
|
?
|
?
|
+
|
?
|
−
|
+
|
?
|
−
| |
+
|
−
|
+
|
+
|
+
|
−
|
?
|
7/16 (44)
|
|
Cross-sectional study
|
|
Auvinen et al. [4]
|
+
|
+
|
−
| |
−
|
−
|
+
|
+
|
+
|
+
| | |
+
|
+
|
+
|
+
|
+
|
11/14 (78)
|
|
Auvinen et al. [5]
|
+
|
+
|
−
| |
−
|
−
|
+
|
+
|
+
|
+
| | |
+
|
+
|
+
|
+
|
+
|
11/14 (78)
|
|
Heneweer et al. [20]
|
+
|
?
|
−
| |
+
|
−
|
+
|
+
|
+
|
+
| | |
+
|
+
|
+
|
+
|
+
|
11/14 (78)
|
|
Østerås et al. [36]
|
+
|
+
|
+
| |
−
|
−
|
−
|
+
|
+
|
+
| | |
+
|
+
|
+
|
+
|
+
|
11/14 (78)
|
|
Björck-van Dijken et al. [6]
|
+
|
+
|
−
| |
+
|
?
|
+
|
+
|
+
|
?
| | |
?
|
+
|
+
|
+
|
+
|
10/14 (71)
|
|
Sjolie [39]
|
+
|
+
|
+
| |
−
|
−
|
+
|
+
|
−
|
+
| | |
+
|
+
|
+
|
+
|
?
|
10/14 (71)
|
|
Diepenmaat et al. [14]
|
+
|
?
|
+
| |
?
|
−
|
+
|
?
|
+
|
+
| | |
+
|
+
|
+
|
?
|
+
|
9/14 (64)
|
|
Brown et al. [9]
|
+
|
−
|
+
| |
?
|
−
|
+
|
+
|
−
|
+
| | |
−
|
+
|
+
|
+
|
?
|
8/14 (57)
|
|
Kujala et al. [29]
|
+
|
+
|
?
| |
−
|
−
|
+
|
+
|
+
|
+
| | |
+
|
+
|
−
|
?
|
?
|
8/14 (57)
|
|
Wedderkopp et al. [46]
|
+
|
+
|
+
| |
−
|
−
|
+
|
+
|
+
|
+
| | |
−
|
+
|
−
|
?
|
?
|
8/14 (57)
|
|
Jacob et al. [24]
|
+
|
−
|
−
| |
+
|
−
|
−
|
+
|
+
|
+
| | |
+
|
+
|
−
|
−
|
?
|
7/14 (50)
|
|
Andersen et al. [3]
|
+
|
+
|
−
| |
+
|
−
|
−
|
?
|
+
|
+
| | |
?
|
+
|
−
|
?
|
?
|
6/14 (43)
|