Acker et al. (2015) [36]
|
P
|
Qualitative
|
27
|
5
|
22
|
0
|
-(−)
|
Single
|
Single
|
Canada
|
Appel et al. (2003) [37]
|
P
|
Mixed
|
159
|
77
|
82
|
0
|
-(−)
|
Single
|
Single
|
Sweden
|
Bauer (2016) [48]
|
D
|
Quantitative
|
118
|
28
|
90
|
0
|
-(−)
|
Multiple
|
Single
|
USA
|
Bazrafkan et al. (2016) [41]
|
P
|
Qualitative
|
–
|
–
|
–
|
–
|
32(9)
|
Multiple
|
Single
|
Iran
|
Begun et al. (2017) [49]
|
P
|
Mixed
|
281
|
219
|
60
|
2
|
38(9)
|
Multiple
|
Single
|
USA
|
Benjamin et al. (2017) [50]
|
P
|
Qualitative
|
29
|
11
|
18
|
0
|
-(−)
|
Multiple
|
Single
|
USA
|
Benesek (1998) [51]
|
D
|
Quantitative
|
66
|
11
|
55
|
0
|
-(−)
|
Multiple
|
Single
|
USA
|
Bireda (2015) [52]
|
P
|
Qualitative
|
5
|
0
|
5
|
0
|
-(−)
|
Single
|
Single
|
Ethiopia
|
Bolliger et al. (2012) [53]
|
P
|
Quantitative
|
84
|
-
|
-
|
-
|
42(−)
|
Single
|
Single
|
USA
|
Cole (2008) [54]
|
D
|
Quantitative
|
261
|
98
|
161
|
0
|
-(−)
|
Multiple
|
Multiple
|
-
|
Cotterall (2013) [42]
|
P
|
Qualitative
|
6
|
3
|
3
|
0
|
-(−)
|
Single
|
Single
|
Australia
|
Devine et al. (2017) [55]
|
P
|
Mixed*
|
183
|
33
|
150
|
0
|
33(6)
|
Multiple
|
Multiple
|
Canada
|
Devonport et al. (2014) [38]
|
P
|
Qualitative
|
2
|
2
|
0
|
0
|
27(−)
|
Single
|
Single
|
UK
|
Drake (2010) [56]
|
D
|
Quantitative
|
220
|
40
|
180
|
0
|
28(5)
|
Multiple
|
Single
|
USA
|
Dumitrescu (2016) [57]
|
D
|
Quantitative
|
153
|
37
|
115
|
1
|
34(8)
|
Multiple
|
Single
|
USA
|
El-Ghoroury et al. (2012) [58]
|
P
|
Quantitative
|
209
|
–
|
–
|
–
|
-(−)
|
Multiple
|
Single
|
USA
|
Enzor (2017) [39]
|
D
|
Qualitative
|
10
|
2
|
8
|
0
|
-(−)
|
Multiple
|
Single
|
-
|
Haynes et al. (2012) [59]
|
P
|
Qualitative
|
8
|
0
|
8
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Hill (2010) [60]
|
D
|
Quantitative
|
64
|
29
|
35
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Holahan (1979) [61]
|
P
|
Quantitative
|
377
|
0
|
377
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Hunter et al. (2016) [62]
|
P
|
Mixed*
|
186
|
150
|
36
|
0
|
33(7)
|
Multiple
|
Multiple
|
Canada
|
Kaufman (2004) [43]
|
D
|
Mixed
|
41
|
7
|
33
|
0
|
41(−)
|
Single
|
Single
|
USA
|
Kaufman (2006) [63]
|
P
|
Quantitative
|
41
|
7
|
34
|
0
|
41(−)
|
Single
|
Single
|
USA
|
Kenty (2000) [44]
|
P
|
Mixed
|
111
|
0
|
111
|
0
|
45(43)
|
Multiple
|
Single
|
USA
|
Kurtz-Costes et al. (2006) [40]
|
P
|
Qualitative
|
20
|
8
|
12
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Levecque et al. (2017) [64]
|
P
|
Quantitative
|
3659
|
–
|
–
|
–
|
28(5)
|
Multiple
|
Single
|
Finland
|
Lonka et al. (2014) [65]
|
P
|
Quantitative
|
669
|
168
|
496
|
0
|
39(-)
|
Single
|
Single
|
Finland
|
Lowe (2015) [66]
|
D
|
Quantitative
|
338
|
60
|
276
|
2
|
-(-)
|
Multiple
|
Single
|
USA
|
Marais et al. (2018) [67]
|
P
|
Quantitative
|
136
|
36
|
100
|
0
|
-(−)
|
Single
|
Single
|
France
|
Martinez et al. (2013) [68]
|
P
|
Qualitative
|
5
|
–
|
–
|
–
|
-(−)
|
Single
|
Single
|
USA
|
McGregor et al. (2008) [69]
|
P
|
Quantitative
|
10
|
3
|
7
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Nelson (2014) [70]
|
D
|
Quantitative
|
156
|
47
|
109
|
0
|
-(−)
|
Multiple
|
Single
|
USA
|
Nottingham (2017) [71]
|
D
|
Quantitative
|
116
|
40
|
76
|
0
|
-(−)
|
Multiple
|
Single
|
USA
|
Orozco (2014) [72]
|
D
|
Quantitative
|
161
|
23
|
138
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Peters (2007) [73]
|
D
|
Quantitative
|
104
|
24
|
79
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Pifer et al. (2014) [74]
|
P
|
Qualitative
|
31
|
17
|
14
|
0
|
33(−)
|
Single
|
Single
|
USA
|
Platt et al. (1995) [75]
|
P
|
Quantitative
|
53
|
–
|
–
|
–
|
-(−)
|
Single
|
Single
|
USA
|
Pychyl (1995) [76]
|
D
|
Mixed*
|
19
|
8
|
11
|
0
|
-(−)
|
Single
|
Single
|
Canada
|
Pychyl et al. (1998) [77]
|
P
|
Mixed
|
81
|
36
|
45
|
0
|
35(−)
|
Single
|
Single
|
Canada
|
Rocha-Singh (1994) [78]
|
P
|
Quantitative
|
469
|
178
|
291
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Scheidler (2008) [79]
|
D
|
Quantitative
|
507
|
141
|
363
|
3
|
42(−)
|
Multiple
|
Single
|
USA
|
Scrubb (1997) [45]
|
D
|
Mixed
|
156
|
80
|
76
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Sekas et al. (1980) [80]
|
P
|
Quantitative
|
42
|
–
|
–
|
–
|
-(−)
|
Single
|
Single
|
USA
|
Stubb et al. (2011) [81]
|
P
|
Mixed
|
669
|
168
|
496
|
0
|
39(−)
|
Single
|
Single
|
Finland
|
Stubb et al. (2012) [82]
|
P
|
Mixed
|
669
|
–
|
–
|
–
|
-(−)
|
Single
|
Single
|
Finland
|
Ülkü-Steiner et al. (2000) [83]
|
P
|
Quantitative
|
714
|
293
|
421
|
0
|
-(−)
|
Single
|
Single
|
USA
|
Usman Yousaf et al. (2016) [46]
|
P
|
Qualitative
|
8
|
–
|
–
|
–
|
-(−)
|
Single
|
Single
|
Malaysia
|
Volkert et al. (2018) [84]
|
P
|
Quantitative
|
835
|
–
|
–
|
–
|
-(−)
|
Multiple
|
Single
|
USA
|
Waaijer et al. (2016) [85]
|
P
|
Quantitative
|
218
|
111
|
107
|
0
|
-(−)
|
Single
|
Single
|
Netherlands
|
Wang et al. (2010) [86]
|
P
|
Qualitative
|
1
|
1
|
0
|
0
|
30(N/A)
|
Single
|
Single
|
Taiwan
|
Williams (2014) [87]
|
D
|
Quantitative
|
140
|
37
|
101
|
2
|
29(6)
|
Multiple
|
Single
|
USA
|
Wright (2006) [88]
|
P
|
Quantitative
|
15
|
7
|
8
|
0
|
-(−)
|
Single
|
Single
|
UK
|