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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Subst Use Misuse. 2011 Nov 14;47(3):329–341. doi: 10.3109/10826084.2011.630225

Table 4.

Comparison of Top 20 Websites Returned from Google™ and Yahoo™ During May of 2006.

Google™ (%) Yahoo™ (%)
Mean Range Mean Range
Retail 1 0 – 5 18 5 – 35
Portal 25 10 – 35 41 25 – 65
Total Commercial * 26 10 – 40 59 30 – 75
Pro-use 44 25 – 55 76 50 – 85
Anti-misuse 0 0 – 0 1 0 – 5
Neutral 37 5 – 65 15 0 – 35
Other 19 3 – 4 8 0 – 2
*

Total Commercial = sum of Retail and Portal.