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Table 1 Demographic and clinical characteristics of study participants

From: Developing a risk prediction model for the functional outcome after hip arthroscopy

Characteristic Total sample (n = 203) Patients with successful outcomea (n = 133) Patients with unsuccessful outcomea (n = 46) Patients with missing outcome (n = 24)
Value Missing Value Missing Value Missing Value Missing
Gender (female) 114 (56%) 64 (48%) 33 (72%) 17 (71%)
Age (yrs) 40 (11, 15–67) 40 (11, 17–67) 40 (10, 18–55) 39 (13, 15–64)
BMI (kg/m2) 26 (4, 18–42) 25 (4, 18–35) 26 (5, 20–42) 27 (6, 20–40)
Duration of complaints (yrs) 4 (4, 1–30) 4 (4, 1–25) 3 (2, 1–10) 5 (6, 1–30)
Tönnis classification 193 10 (5%) 128 5 (4%) 45 1 (2%) 20 4 (17%)
 Grade 0 142 (74%) 94 (73%) 35 (78%) 13 (65%)
 Grade 1 46 (23%) 32 (25%) 9 (20%) 5 (25%)
 Grade 2 5 (3%) 2 (2%) 1 (2%) 2 (10%)
Alpha angle (o) 64 (14, 39–99) 66 (14, 39–99) 62 (13, 39–91) 62 (14, 43–89)
Cam 120 (59%) 87 (65%) 20 (44%) 13 (54%)
Pincer 45 (22%) 26 (20%) 12 (26%) 7 (29%)
Labral tear 138 (68%) 87 (65%) 37 (80%) 14 (58%)
Preoperative PRO scores
 VAS pain, mean 6 (2, 1–10) 6 (2, 1–10) 6 (2, 2–9) 7 (1,3–9)
 mHHS, mean (SD, range) 55 (12, 22–90) 57 (12, 26–90) 53 (11, 23–80) 50 (14, 22–72)
 HOS-ADL, mean (SD, range) 58 (20, 7–96) 2 (1%) 60 (20, 7–96) 53 (18, 14–84) 55 (22, 15–91) 2 (8%)
 HOS-Sport, mean (SD, range) 40 (22, 0–94) 11 (5%) 42 (23, 0–94) 3 (2%) 38 (19, 3–78) 3 (7%) 34 (22, 0–72) 5 (21%)
 WHOQOL physical, mean (SD, range) 49 (16, 7–86) 30 (15%) 50 (16, 7–86) 17 (13%) 48 (14, 21–82) 6 (13%) 45 (19, 7–75) 7 (29%)
 WHOQOL psychological, mean (SD, range) 71 (15, 13–100) 29 (14%) 72 (15, 13–100) 16 (12%) 67 (16, 25–95) 6 (13%) 69 (16, 38–96) 7 (29%)
PRO scores at 3 months postoperative
 VAS pain 3 (2, 0–9) 12 (6%) 2 (2, 0–9) 6 (5%) 4 (3, 0–8) 1 (2%) 2 (2, 0–6) 5 (21%)
 mHHS 73 (15, 17–91) 12 (6%) 77 (12, 41–91) 5 (4%) 63 (18, 17–91) 1 (2%) 69 (15, 41–87) 6 (25%)
 HOS-ADL 76 (20, 27–100) 118 (58%) 81 (15, 38–100) 77 (58%) 64 (23, 28–100) 27 (59%) 73 (25, 27–100) 14 (58%)
 HOS-Sport 62 (27, 6–100) 129 (64%) 65 (24, 6–100) 83 (62%) 51 (32, 6–100) 29 (63%) 63 (26, 33–97) 17 (71%)
 WHOQOL physical         
 WHOQOL psychological         
PRO scores at 1 year postoperative
 VAS pain 3 (3, 0–9) 20 (10%) 1 (2, 0–9) 5 (2, 0–9) 6 (4, 1–9) 20 (83%)
 mHHS 77 (16, 27–91) 25 (12%) 84 (9, 47–91) 1 (1%) 57 (15, 27–91) 3 (7%) 60 (31, 29–91) 21 (88%)
 HOS-ADL 81 (21, 14–100) 24 (12%) 91 (9, 56–100) 51 (17, 14–78) 24 (100%)
 HOS-Sport 71 (26, 11–100) 36 (18%) 83 (16, 28–100) 7 (5%) 36 (18, 11–81) 6 (13%) 38 (38, 38–38) 23 (96%)
 WHOQOL physical 70 (20, 7–100) 26 (13%) 77 (15, 7–100) 3 (2%) 48 (17, 14–79) 1 (2%) 50 (25, 32–68) 22 (92%)
 WHOQOL psychological 76 (14, 29–100) 26 (13%) 79 (13, 29–100) 3 (2%) 68 (13, 38–92) 1 (2%) 52 (9, 46–58) 22 (92%)
Components of composite outcome
Increase in HOS-ADL > 23 85 (47%) 24 (12%) 85 (64%) 0 (0%) 24 (100%)
Postoperative HOS-ADL > 80 120 (67%) 24 (12%) 120 (90%) 0 (0%) 24 (100%)
  1. aSuccessful outcome is defined as an HOSADL > 80 or HOSADL increase > 23 1 year postoperative
  2. Unless otherwise indicated values between parentheses are (sd, range)