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Table 2 Generic quality and risk of bias (domain 2). Sub-domains with a range of items were assessed. Scores between 0 and 2 were used

From: German dentists’ websites on periodontitis have low quality of information

Sub-domain

Item

Median (25th/75th percentiles, min-max)

Reliability

Are the aims clear?

2 (2/2; 0–2)

Reliability

Is it clear who pays for it?

1 (1/1; 0–2)

Reliability

Is there a declaration of the objectives of the people who run the site?

2 (2/2; 0–2)

Reliability

Is it clear who runs the site?

0 (0/2; 0–2)

Reliability

Is it current?

2 (2/2; 0–2)

Reliability

Is it clear what information sources were used?

0 (0/1; 0–2)

Reliability

Is it clear when the information sources were produced?

0 (0/0; 0–2)

Reliability

Is it balanced and unbiased?

2 (2/2; 0–2)

Reliability

Does it provide details of additional sources?

0 (0/1; 0–2)

Reliability

Does it refer to areas of uncertainty?

0 (0/1; 0–2)

Quality

Does it describe how each treatment works?

1 (0/1; 0–2)

Quality

Does it describe the benefit of each treatment?

1 (0/1; 0–2)

Quality

Does it describe the risk of each treatment?

0 (0/0; 0–2)

Quality

Does it describe what would happen if no treatment is used?

0 (0/0; 0–2)

Quality

Does it describe how the choice of treatment affect quality of life?

0 (0/1; 0–2)

Quality

Is it clear that there may be more than one possible treatment?

1 (0/1; 0–2)

Quality

Does it provide support for shared decision making?

1 (1/2; 0–2)