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Table 2 Demographic data of the study groups

From: Lower rate of acceptable knee function in adolescents compared with young adults five years after acl reconstruction: results from the swedish national knee ligament register

 

Total

(n = 2,848)

Paediatric

(n = 47)

Adolescent

(n = 522)

Young adult

(n = 2,279)

Gender

 Male

1,699 (59.7%)

34 (72.3%)

208 (39.8%)

1,457 (63.9%)

 Female

1,149 (40.3%)

13 (27.7%)

314 (60.2%)

822 (36.1%)

Age at index surgery

25.0 (5.7)

25 (9; 35)

13.6 (1.6)

14 (9; 15)

17.4 (1.4)

18 (14; 19)

27.0 (4.5)

26 (20; 35)

Activity at ACL injury

 Pivoting sports

1,759 (61.8%)

23 (48.9%)

355 (68.0%)

1,381 (60.6%)

 Non-pivoting sports

64 (2.2%)

1 (2.1%)

12 (2.3%)

51 (2.2%)

 Martial arts

75 (2.6%)

1 (2.1%)

8 (1.5%)

66 (2.9%)

 Winter sports

382 (13.4%)

8 (17.0%)

62 (11.9%)

312 (13.7%)

 Other

560 (19.7%)

14 (29.8%)

85 (16.3%)

461 (20.2%)

 Missing

8 (0.3%)

0

0

8 (0.4%)

Groups of femoral fixation

 Cortical suspensory fixation

1,234 (43.3%)

32 (68.1%)

209 (40.0%)

993 (43.6%)

 Adjustable cortical suspensory fixation

416 (14.6%)

11 (23.4%)

73 (14.0%)

332 (14.6%)

 Screw fixation

340 (11.9%)

1 (2.1%)

72 (13.8%)

267 (11.7%)

 Intratunnel transfixation

828 (29.1%)

3 (6.4%)

165 (31.6%)

660 (29.0%)

 Other

17 (0.6%)

0

3 (0.6%)

14 (0.6%)

 Femur fixation missing

13 (0.5%)

0

0

13 (0.6%)

Groups of tibial fixation

 Cortical suspensory fixation

22 (0.8%)

0

3 (0.6%)

19 (0.8%)

 Adjustable cortical suspensory fixation

147 (5.2%)

4 (8.5%)

32 (6.1%)

111 (4.9%)

 Screw fixation

1,981 (69.6%)

36 (76.6%)

360 (69.0%)

1,585 (69.5%)

 Bioabsorbable screw

544 (19.1%)

4 (8.5%)

101 (19.3%)

439 (19.3%)

 Intratunnel transfixation

82 (2.9%)

0

17 (3.3%)

65 (2.9%)

 Other

52 (1.8%)

3 (6.4%)

8 (1.5%)

41 (1.8%)

 Tibial fixation missing

20 (0.7%)

0

1 (0.2%)

19 (0.8%)

Concomitant injuries

 Medial meniscus

1,063 (37.3%)

13 (27.7%)

185 (35.4%)

865 (38.0%)

 Lateral meniscus

690 (24.2%)

14 (29.8%)

143 (27.4%)

533 (23.4%)

 Cartilage injury

956 (33.6%)

5 (10.6%)

126 (24.1%)

825 (36.2%)

 MCL

18 (0.6%)

0

1 (0.2%)

17 (0.7%)

 LCL

6 (0.2%)

0

1 (0.2%)

5 (0.2%)

  1. ACL Anterior cruciate ligament, LCL Lateral collateral ligament, MCL Medial collateral ligament