There are key factors which have been overlooked in the international corruption survey which states that 47 percent of South Africans paid bribes to government officials, the police said on Sunday.

Three factors had been overlooked, Lieutenant General Solomon Makgale said.

The first, that only 1 000 urban residents were used as a sample group.

"One must wonder if a survey amongst 1 000 urban respondents is a true representation...read more here: SAPS makes excuses for bribes in South Africa survey