More and more workers are cheating on drug tests, according to new data from Quest Diagnostics, with tampering rates reaching a 30-year high in 2023. After analyzing nearly 9.8 million workforce drug ...

The rate of substituted or invalid drug tests — an indication of tampering to hide drug use — rose more than six-fold in 2023 versus the prior year, according to a Quest Diagnostics analysis of 9.8 ...

Data from New Jersey-based drug test provider Quest Diagnostics involved an analysis of over 8 million workplace drug tests carried out during the last year—meaning the results are statistically ...

In the highest rate in more than 30 years of annual reporting, the percentage of employees in the general U.S. workforce whose drug test showed signs of tampering increased by more than six-fold in ...

A record number of U.S. workers are cheating on employer drug tests by tampering with urine samples or using other means to evade detection, new research shows. The percentage of employees who tried ...