Empty Table Headers
When marking up data tables, avoid empty table headers (<th> element). Empty headers can cause confusion for screen reader users because there is no information to be read for a data row or column, or they may cause the screen reader to associate a header to an incorrect column or row. Pay particular attention to the first cell, in the upper-left corner. While this cell is usually a column header(<th scope=”col”>), it can also be a row header(<th scope=”row”>), or left empty. If a header is empty, identify it as a table data cell (<td></td>), not a table header.
