Table 4 Stratified inclusion rates in database combinations with MEDLINE and reference checking (mean [95% CI])

≥4 dB

94.4% [93.8 to 94.9%]

94.5% [93.9 to 95.1%]

99.3% [99.2 to 99.5%]

94.8% [94.3 to 95.4%]

96.4% [95.9 to 96.9%]

1–3 dB

95.1% [94.5 to 95.8%]

95.7% [95.1 to 96.4%]

98.8% [98.4 to 99.2%]

95.7% [95.2 to 96.3%]

96.0% [95.4 to 96.7%]

Δ in means

0.8%

1.3%

−0.5%

0.9%

−0.4%

p-value

0.078

0.004

0.009

0.020

0.370

Other sources

93.5% [92.8 to 94.2%]

93.9% [93.2 to 94.6%]

98.9% [98.7 to 99.2%]

94.3% [93.7 to 95.0%]

95.3% [94.7 to 95.9%]

No other sources

96.3% [96.0 to 96.6%]

96.3% [95.9 to 96.6%]

99.6% [99.5 to 99.7%]

96.3% [96.0 to 96.5%]

97.9% [97.8 to 98.1%]

Δ in means

2.8%

2.4%

0.7%

1.9%

2.7%

p-value

< 0.001*

< 0.001*

< 0.001*

< 0.001*

< 0.001*

HTA report

86.2% [82.8 to 89.6%]

86.2% [82.8 to 89.6%]

97.7% [96.5 to 98.9%]

83.9% [80.7 to 87.1%]

95.4% [93.7 to 97.1%]

Cochrane Overview

97.8% [97.5 to 98.1%]

100.0%

100.0%

97.8% [97.5 to 98.1%]

100.0%

Non-Cochrane Overview

95.1% [94.7 to 95.5%]

95.3% [94.9 to 95.7%]

99.3% [99.1 to 99.4%]

95.9% [95.5 to 96.2%]

96.2% [95.8 to 96.6%]

Δ in means for HTA vs. non-Cochrane

8.9%

9.1%

1.6%

12.0%

0.8%

p-value for HTA vs. non-Cochrane

< 0.001*

< 0.001*

0.012

< 0.001*

0.274

Intervention Overview

95.0% [94.6 to 95.5%]

95.0% [94.6 to 95.5%]

99.3% [99.1 to 99.5%]

95.5% [95.1 to 95.9%]

96.0% [95.6 to 96.5%]

Non-intervention Overview

93.2% [92.1 to 94.4%]

94.2% [93.1 to 95.3%]

98.7% [98.5 to 99.0%]

93.9% [92.8 to 95.0%]

97.1% [96.7 to 97.6%]

Δ in means

−1.8%

−0.8%

−0.6%

−1.6%

1.1%

p-value

0.004

0.182

< 0.001*

0.010

0.001*

Psyc. topic

91.8% [89.8 to 93.8%]

95.9% [94.6 to 97.2%]

100.0%

95.9% [94.5 to 97.4%]

93.9% [92.0 to 95.8%]

No psyc. Topic

94.8% [94.3 to 95.4%]

94.7% [94.1 to 95.3%]

99.1% [98.9 to 99.3%]

95.0% [94.5 to 95.5%]

96.5% [96.1 to 97.0%]

Δ in means

3.0%

−1.2%

−0.9%

−0.9%

2.6%

p-value

0.005

0.093

0.000*

0.243

0.010