Results of the District school board election and a controversial rent-control referendum were unaffected by the counting late yesterday of more than 1,000 absentee and challenged ballots, the D.C. Board of Elections and Ethics reported.

About 75 percent of the 1,121 votes that were added to the Nov. 5 tally were absentee ballots, officials said.

One-fourth were ballots cast by voters whose names did not appear on the registration roster at polling places on election day.

Yesterday was the deadline for absentee ballots and explanations from voters who wanted their challenged ballots included in the final tally. The final total will be certified Monday, officials said.

In Ward 8, where incumbent R. Calvin Lockridge edged out Absalom Jordan by about 30 votes in last week's balloting to retain his school board seat, yesterday's tally indicated that Lockridge maintained a winning margin, with 34 more votes than Jordan.

Election officials added 60 absentee and challenged ballots to the Ward 8 votes, they said.

In an upset victory over longtime incumbent Barbara Lett Simmons, challenger Phyllis Young remained the victor, receiving 2,939 more votes than Simmons.

The rent-control referendum, which was placed on the ballot by rent control activists, passed with 22,920 votes for it and 22,183 votes against it, election officials said.