Overview of the characteristics of the included studies
| Study/year (country) | SS group/CS group | |||||||||
| Number of patients | Number of hips | Age (mean), years | Gender (% male) | Follow-up (mean), years | Type of implant (company) | Dorr type | Outcome assessment | |||
| Type A | Type B | Type C | ||||||||
| Sluimer et al 20 /2006(Netherlands) | 80 | 40/40 | 53/56 | 37/43 | 2.0/2.0 | Omnifit-HA1090 (Osteonics)/ Omnifit-HA1017 (Osteonics) | NA | HHS, BMD, Engh score | ||
| Calsson et al
29/2006 (Sweden) | 52 | 24/29 | 59 | NA | 3.0/3.0 | GOT (Astra Tech AB)/Spectrum (Smith & Nephew) | NA | HHS, VAS, radiograph (RSA) | ||
| Kim23/2011 (Korea) | 100 | 60/60 | 54.3/51.8 | 44/48 | 3.3/3.4 | Proxima (DePuy)/ Profile (DePuy) | 58/55 | 2/5 | 0 | HHS, BMD, radiograph, activity score |
| Kim24/2012 (Korea) | 140 | 70/70 | 74.9/76 | 27/24 | 4.1/4.8 | Proxima (DePuy)/ AML (DePuy) | 6/8 | 21/18 | 43/44 | HHS, WOMAC, UCLA activity score |
| Roth et al
33/2014 (Germany) | 80 | 40/40 | 60.1/64.8 | 58/48 | 0.115/0.115 | Fitmore (Zimmer)/ CLS (Zimmer) | NA | HHS, WOMAC, SF-36, radiograph | ||
| Salemyr et al
19 /2015 (Sweden) | 51 | 26/25 | 62/62 | 59/43 | 2 | Proxima (DePuy)/ Bimetric (Biomet) | 26 | 25 | 0 | HHS, BMD, WOMAC, radiograph (RSA), EQ-5D, thigh pain |
| McCalden et al
32/ 2015 (Canada) | 43 | 22/21 | 62.8/66.6 | 37/38 | 2 | SMF (Smith & Nephew)/ Synergy (Smith & Nephew) | NA | 0 | HHS, WOMAC, SF-12, radiograph | |
| Freitag et al
22/2016 (Germany) | 138 | 57/81 | 56.8/59.1 | 63/63 | 1.0/1.0 | Fitmore (Zimmer)/ CLS (Zimmer) | NA | 0 | HHS, BMD, WOMAC, | |
| Kim30/2016 (Korea) | 200 | 200/200 | 52.5/52.5 | 69/69 | 11.8 | Proxima (DePuy)/ Profile (DePuy) | 102/100 | 62/64 | 36/36 | HHS, BMD, WOMAC, UCLA activity score, radiograph |
| Koyano et al
21/2017 (Japan) | 36 | 36/36 | 51.7 | 11/11 | 9.2 | Super Secur-Fit (Stryker)/CentPillar GBHA (Stryker) | 10/8 | 26/28 | 0 | JOA hip score, BMD |
| Schilcher et al
31/ 2017 (Sweden) | 60 | 30/30 | 59.4/60.6 | 43/37 | 2.0/2.0 | Taperloc Microplasty (Biomet)/Taperloc (Biomet) | 21 | 39 | 0 | HHS, BMD, WOMAC, radiograph (RSA) |
| Oldenrijk et al
36/ 2017 (Netherlands) | 150 | 75/75 | 60.3/60.5 | 28/29 | 2.0/2.0 | CFP (Link)/ Alloclassic Zweymuller (Zimmer-Biomet) | NA | HOOS, HHS, PCS-12, Pain-NRS Score, TUG, Trendelenburg test, EQ5D | ||
AML, anatomical medullary locking fully porous coated cementless femoral component; BMD, bone mineral density; CFP, collum femoris preserving stem; CLS, cementless straight stem; CS, conventional stem prostheses; GOT, Gothenburg osseointegrated titanium hip; HA, hydroxyapatite; HHS, Harris Hip Score; HOOS, hip disability and osteoarthritis outcome score; JOA, Japanese Orthopaedic Association; MTPM, maximum total point motion; NA, not available; PCS-12: physical component scale of the SF12; RSA, radiostereometric analysis; SF-36: short form 36-item health survey; SMF, short metaphyseal fixation stem; SS, short-stem prostheses; TUG, timed up-and-go test; VAS, visual analogue scale; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.