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. 2013 Oct 21;2:95. doi: 10.1186/2046-4053-2-95

Table 1.

Study-level covariate values, observed effect size measures and pooled heterogeneity estimates listed in order of increasing relative risk

Study Type of controla IPDASi, probability dimension score/32 Rescaled IPDASi, probability dimension score (%) CER Logit control ln(OR) ORb RRb
Lerman et al.[28]
 A
 16
 33
 0.66
 0.65
 0.37
 1.46
 1.12
Johnson et al. [32]
 A
 16
 33
 0.77
 1.17
 0.96
 2.86
 1.17
Wolf and Schorling [24]
 B
 19
 46
 0.54
 0.16
 0.73
 2.08
 1.31
Whelan et al. [25]
 A
 17
 38
 0.58
 0.32
 0.91
 2.52
 1.34
McBride et al. [27]
 A
 23
 63
 0.30
 −0.85
 0.49
 1.64
 1.37
Schapira and Vanruiswyk [23]
 B
 28
 83
 0.47
 −0.10
 0.89
 2.45
 1.45
Dodin et al. [31]
 B
 26c
 75
 0.43
 −0.28
 0.82
 2.32
 1.48
O’Connor et al. [8]
 C
 26c
 75
 0.46
 −0.14
 1.05
 2.91
 1.54
Whelan et al. [21]
 B
 22
 58
 0.37
 −0.53
 0.82
 2.29
 1.55
Kuppermann et al. [36]
 C
 NA
 NA
 0.32
 −0.76
 1.35
 3.88
 2.03
Vandemheen et al. [37]
 B
 30
 92
 0.29
 −0.88
 1.52
 4.67
 2.26
McAlister et al. [29]
 A
 29d
 88
 0.16
 −1.62
 1.11
 3.06
 2.29
Mathieu et al. [34]
 B
 31
 96
 0.22
 −1.29
 1.54
 4.71
 2.62
Man-Son-Hing et al., [30]
 A
 29d
 88
 0.24
 −1.16
 1.83
 6.32
 2.80
Weymiller et al. [35]
 B
 32
 100
 0.18
 −1.48
 1.88
 6.94
 3.38
Laupacis et al. [33]
 A
 24
 67
 0.08
 −2.34
 1.50
 4.88
 3.72
Gattellari and Ward [22]
 B
 21
 54
 0.10
 −2.14
 2.29
 10.26
 5.28
Chi-squared (heterogeneity)
 55.75
 56.41
 120.19
I2 71% 72% 87%

a A, no standardized information; B, standardized generic information (no outcome information); C, simple decision aid (no standardized probability information).

b No continuity correction was applied to match Review Manager’s output.

c Same decision aid for both trials.

d Same decision aid for both trials.

CER, control event rate; IPDASi, International Patient Decision Aid Standards instrument; NA, full decision aid not available for rating; OR, odds ratio; RR, relative risk.