Table 3.
2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | p | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | |||||||||||||||||
n | 171 | 178 | 234 | 193 | 198 | 233 | 223 | 264 | 0.017 | ||||||||
Percent of diagnosed | 1.9% | 1.9% | 2.5% | 2.0% | 2.0% | 2.2% | 1.9% | 1.8% | 0.623 | ||||||||
Gender | |||||||||||||||||
Female | 102 | (59.6%) | 103 | (57.9%) | 130 | (55.6%) | 96 | (49.7%) | 111 | (56.1%) | 122 | (52.4%) | 115 | (51.6%) | 141 | (53.4%) | 0.063 |
Male | 69 | (40.4%) | 75 | (42.1%) | 104 | (44.4%) | 97 | (50.3%) | 87 | (43.9%) | 111 | (47.6%) | 108 | (48.4%) | 123 | (46.6%) | |
Age (years) | |||||||||||||||||
<40 | 28 | (16.4%) | 27 | (15.2%) | 29 | (12.4%) | 23 | (11.9%) | 21 | (10.6%) | 20 | (8.6%) | 20 | (9.0%) | 22 | (8.3%) | <0.001 |
40–64 | 137 | (80.1%) | 139 | (78.1%) | 190 | (81.2%) | 155 | (80.3%) | 144 | (72.7%) | 179 | (76.8%) | 169 | (75.8%) | 202 | (76.5%) | 0.121 |
≥65 | 6 | (3.5%) | 12 | (6.7%) | 15 | (6.4%) | 15 | (7.8%) | 33 | (16.7%) | 34 | (14.6%) | 34 | (15.2%) | 40 | (15.2%) | 0.003 |
Region (incidence per 100,000 patients) | |||||||||||||||||
Northeast | 0.8 | 0.2 | 1.5 | 0.3 | 0.7 | 0.9 | 0.6 | 0.8 | 0.918 | ||||||||
Midwest | 3.3 | 2.5 | 4.2 | 3.3 | 2.8 | 3.6 | 2.9 | 2.4 | 0.438 | ||||||||
West | 2.0 | 1.9 | 3.2 | 3.4 | 1.6 | 2.4 | 1.4 | 1.6 | 0.370 | ||||||||
South | 2.9 | 3.2 | 3.8 | 3.6 | 3.8 | 3.6 | 3.5 | 3.4 | 0.277 | ||||||||
Surgical approach | |||||||||||||||||
Open | 164 | (95.9%) | 171 | (96.1%) | 226 | (96.6%) | 184 | (95.3%) | 192 | (97.0%) | 217 | (93.1%) | 204 | (91.5%) | 252 | (95.5%) | 0.169 |
Arthroscopic | 12 | (7.0%) | 9 | (5.1%) | 14 | (6.0%) | 12 | (6.2%) | 6 | (3.0%) | 20 | (8.6%) | 24 | (10.8%) | 18 | (6.8%) | 0.327 |