Texting tendinitis in a teenager.

In the United States, 173 billion text messages were sent monthly by 293 million cell phone subscribers, according to mid-year 2010 data. Th at’s about 20 daily text messages per subscriber. According to the Pew Research Center, 82% of US adults are cell phone users and 72% of adult cell phone users send or receive text messages. Based on a Kaiser Family Foundation study, cell phone ownership is 85% among 15to 18-year olds, 69% among 11to 14-year olds, and 31% among 8to 10-year olds. Th is study reports that 7th to 12th graders, on average, spend 1 hour and 35 minutes each day texting and send 118 messages. Further, only 14% of these young people say their parents have established any rules about the number of texts they are allowed to send. Additionally, based on this same study, girls, older teens, and non-Hispanic blacks spend more time texting than other groups.