A 49-year-old woman is diagnosed with Sjogren syndrome following complaints of a foreign body sensation in her eyes and a dry mouth. Which one of the following is NOT characteristic of Sjogren syndrome?

Increased risk for beta cell non-Hodgkin's lymphoma

The female: male incidence is approximately 9:1

White people in North America are affected at much higher rates than in other parts of the world

Biopsy of the minor salivary glands is the ideal test to confirm the diagnosis of Sjogren syndrome