According to D.C.’s first mask audit, nearly three quarters of those required to wear a mask did so properly.

On Thursday, D.C. Health Director LaQuandra Nesbitt revealed the results of the city’s mask audit that was conducted from Nov. 18 to Dec. 9. It was done by sending out contact tracers to 151 locations across all eight wards. In total, the contact tracers observed 4,250 individuals.

The results showed that of those more than 4,000 people, 83% had a mask visible. However, only 72% were wearing it properly. Meaning, about 11% of individuals were not wearing masks that covered both their mouth and nose.

“The most common thing that we observed with people not wearing it correctly… there’s often slippage where the nose is not adequately or properly covered,” says Nesbitt.

Most adults wore their mask correctly, Nesbitt said, but it was adolescents and children between the ages of 5 and 18 that were less likely to do so. Approximately 19% of that demographic wore their mask incorrectly.

“We know that it could be a little bit of a challenge for a rambunctious younger person to use a mask,” said Nesbitt. “But also making sure that we get compliance with our teenage population when they are out and about.”

Seniors, those over 65 years old, are more likely to wear their mask correctly than any other demographic.

As did women compared to men. Nearly four in five women, or 79%, wore their mask correctly. Just over two in three men, or 67%, did. More men were observed for the audit than women, though.

In terms of geography, Ward 2 had the highest percentage of those observed wearing a mask correctly (84%) while Ward 7 had the lowest (55%). Wards 1 and 3 also hit 80% while Ward 8 was at 58%.

“It was a noticeably huge gap there in terms of percentages,” said Nesbitt.

Over the last several months, several reports and studies have shown that D.C residents. — compared to many other U.S. states — do a better job of adhering to mask requirements.

The D.C. Mayor’s Office confirmed to DCist/WAMU that this was the first official city-conducted mask audit.