Newly-crowned world 400 metres champion Christine Ohuruogu admits criticism of her selection for Great Britain after a suspension for missing drugs tests has taken the shine off her superb win in Osaka.

The 23-year-old Londoner edged out team-mate Nicola Sanders to lead home a British one-two at the Nagai Stadium.

But there has been mixed reaction from the public who have questioned whether an athlete who has been found guilty of a doping offence should be allowed to compete.

Ohuruogu has also voiced surprise at calls for her lifetime ban issued by the British Olympic Association - which would keep her out of the Beijing Games next year - to be upheld despite her appeal against it.

She said: "The reaction from home has been mixed. I was very disappointed, the way I see it is you are damned if you do and damned if you don't," said Ohuruogu.

"If I hadn't run well people would have questioned why I was brought out here, and when I do try to turn something around it is thrown in my face. I am not happy about it but I just have to deal with it.

"It was expected, I would be stupid if it wasn't. I have had to deal with it over the last year and I managed to only see it as a distraction, so to be honest it won't bother me again."

Ohuruogu has never failed a drugs test but missed a third test in August 2006 after missing two previous ones in October 2005, a fact the Commonwealth Games champion believes is being overlooked by her critics.

Under the testing system in place then, athletes had to give the anti-doping authorities their whereabouts for five hour-long slots every week.

Ohuruogu claims that an event at her regular training track forced her to go elsewhere on the day of her third missed test, and that she simply forgot to tell the authorities.

She claims that it was not until a week later that she was even made aware of the missed test.

"Many people don't understand the system we have. It is very easy to say you had two missed tests and why didn't you make it to that third," she told BBC Radio 5Live.

Ohuruogu also pointed to the recent cases involving Manchester United defender Rio Ferdinand and former Australia cricketer Shane Warne, who have both returned to their respective sports following bans - in Ferdinand's case also for a missed appointment.

"I am not angry, I am just disappointed by the reaction," she added.

"It has made the win a bit sour for me, but I am going to forget and enjoy it. It annoys me that people want to pick and choose who they want to slam down and who they want to raise up even though the circumstances are very much the same.

"I don't understand what benchmark people are using, it just confuses me. But it is only a minority.

"If people really want to find out what happened they will go and do their research, but it annoys me when people listen to hearsay and listen to second-hand stories."

Prime Minster Gordon Brown led the congratulations with a hand-written message and, encouragingly for Ohuruogu, so did British Olympic Association chief executive Simon Clegg.

Ohuruogu, who is set to meet American Sanya Richards at the lucrative Golden League meeting in Zurich next week, revealed she is now looking forward to getting back to work after receiving a warm reception from her fellow athletes in the Far East.

"Athletes and people in the sport are very supportive because they know what we have to go through and athletes understand," she added.

"They have all had missed tests which they are not happy about, it's the people outside that you have to educate and make them aware.

"I have not received any negativity while I have been here, before my races people have been saying it is good to have you back and to go and run well and show them. That meant a lot to me and I was very encouraged."

These sentiments were echoed by silver medallist Sanders, who said: "It's a shame.

"Everybody is negative about athletics and when we do something which is pretty impressive, all they can think of is the negative.

"We should be celebrating the fact she is world champion and she has won a fantastic title."