Table 4.
Subanalyses of Various Shoulder Injury Factors and Outcomes (Days Missed, Surgery, and Reinjury Rate)
| Professional Level of Play | MLB | MiLB | P Value |
|---|---|---|---|
| Total no. of injuries (%) | 483 (14.1%) | 2,931 (85.9%) | |
| Total no. of days missed due to injury | 11,414 | 57,394 | |
| Mean (median) number of days missed per injury | 25.8 (4) | 21.4 (7) | .044 |
| No. of injuries requiring surgery (%) | 48 (9.9%) | 198 (6.8%) | .016 |
| Players who reinjured shoulder (%) | 5 (1.0%) | 83 (2.8%) | .019 |
| Return to play (%) | 482 (99.8%) | 2676 (91.3%) | < .001 |
| Return to same level of play (%) |
457 (94.6 %) |
2,601 (88.7%) |
< .001 |
| Throwing Versus Nonthrowing Shoulder Injuries |
Throwing |
Nonthrowing |
P Value |
| Total no. of injuries (%) | 2,215 (65.1%) | 1,188 (34.9%) | |
| Total no. of days missed due to injury | 44,050 | 24,674 | |
| Mean (median) number of days missed per injury | 21.9 (7) | 22.5 (6) | .768 |
| No. of Injuries requiring surgery (%) | 137 (6.2%) | 109 (9.2%) | .002 |
| Players who reinjured shoulder (%) | 45 (2.0%) | 43 (3.6%) | .007 |
| Return to play (%) | 2,028 (91.6%) | 1,119 (94.2%) | .005 |
| Return to same level of play (%) |
1,963 (88.6%) |
1,084 (91.3%) |
.016 |
| Batting Versus Nonbatting Injury Mechanism |
Batting |
Nonbatting |
P Value |
| Total no. of injuries (%) | 618 (18.4%) | 2,742 (81.6%) | |
| Total no. of days missed due to injury | 11,098 | 55,766 | |
| Mean (median) number of days missed per injury | 19.6 (5) | 22.6 (6) | .136 |
| No. of injuries requiring surgery (%) | 50 (8.1%) | 196 (7.1%) | .354 |
| Players who reinjured shoulder (%) | 19 (3.1%) | 69 (2.5%) | .400 |
| Return to play (%) | 581 (94.0%) | 2,577 (92.2%) | .106 |
| Return to same level of play (%) |
563 (91.1%) |
2,495 (89.2%) |
.162 |
| Front vs back batting shoulder injuries |
Front |
Back |
P value |
| Total no. of injuries (%) | 1,270 (42.4%) | 1,723 (57.6%) | |
| Total no. of days missed due to injury | 23,920 | 34,924 | |
| Mean (median) number of days missed per injury | 20.7 (5.5) | 22.2 (7) | .333 |
| No. of injuries requiring surgery (%) | 104 (8.2%) | 106 (6.2%) | .031 |
| Players who reinjured shoulder (%) | 33 (2.6%) | 38 (2.2%) | .139 |
| Return to play (%) | 1,182 (93.1%) | 1,582 (91.8%) | .200 |
| Return to same level of play (%) | 1,142 (89.9%) | 1,533 (89.0%) | .404 |
MiLB, Minor League Baseball; MLB, Major League Baseball.