Table 5

Reporting characteristics of the analysis of multiple genetic variants for 315 randomly selected HuGE articles (2001–2003)

Reporting characteristic
Count
Percent

Number of genes analyzed


     1
188
59.7
     2
71
22.5
     >= 3
56
17.8
Number of genetic variants analyzed


     1
114
36.2
     2
85
27.0
     3
56
17.8
     4
21
6.6
     >= 5
39
12.4
Reported on linkage disequilibrium (among those studying 2 or more polymorphisms) (n = 201)


     No
155
77.1
     Yes
46
22.9
Reported on an analysis using haplotypes (among those studying 2 or more polymorphisms) (n = 201)


     No
158
78.6
     Yes
43
21.4
Reported on a interlocus or gene-gene interaction (among those studying 2 or more polymorphisms) (n = 201)


     No
152
75.6
     Yes
49
24.4
If interlocus or gene-gene interactions were assessed, was risk quantified as an odds ratio or risk ratio (n = 49)


     No
22
44.9
     Yes
27
55.1
If interlocus or gene-gene interactions were assessed, was risk quantified as an absolute difference (n = 49)


     No
47
95.9
     Yes
2
4.1
If interlocus or gene-gene interactions were assessed, was risk quantified as an attributable fraction (n = 49)


     No
49
100.0
     Yes
0
0.0
If interlocus or gene-gene interactions were assessed, claim was made of a statistically significant interaction (n = 49)


     No
24
49.0
     Yes
25
51.0

Yesupriya et al. BMC Medical Research Methodology 2008 8:31   doi:10.1186/1471-2288-8-31