“…43,56,63,67 Duration: duration assoc w/more hip pain, 66 but not with pain in general or shoulder pain; 48,56,63 one study found a U-shaped curve, with more arm pain o5 years and 420 years after injury and less pain 5-19 years after injury. 65 Course: pain tends to develop months or years after injury; 36,40,45,47,50,55,66,68 once pain develops, it tends to remain stable, 40,48 except for (1) shoulder pain, which shows a tendency to increase over time, 14,66 and (2) Age: rate of PUs assoc w/age in one study (older 4younger), but not others. 67,71,75 Duration: rate of PUS assoc w/duration (o5 years and more than 19 years duration4 5-19 years duration), 49 (20415410 42545 years), 11 (more duration 4less duration), (more than 20 years oless than 20 years duration).…”