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Table 1 Studies included in the review and major variables recorded

From: Surgical treatment of popliteal cyst: a systematic review and meta-analysis

Authors Treatment Newcastle–Ottawa scale Number of patients Follow-up (months) Functional outcomes
Cho [21]  +  +  3 111 24 RL: Grade 0, 98 Grade 1, 13
Hua et al. [32]  +  +  2 41 18 RL: Grade 0, 40 Grade 1, 1
Ko et al. [34]  + a +  3 14 29.7 RL: Grade 0, 14
Ahn et al. [22]  +  + b 3 31 36.1 RL: Grade 0, 25 Grade 1, 5 Grade 2, 1
Ohishi et al. [30]  +  2 29 22.9 RL: Grade 0, 26 Grade 1, 1 Grade 2, 1 Grade 3, 1
Lie et al. [31]  +  1 10 13 RL: Grade 0, 7 Grade 1, 3
Sansone et al. [12]  +  2 30 32 RL: Grade 0, 19 Grade 1, 10 Grade 2, 1
Calvisi et al. [33]  +  3 22 24 RL: Grade 0, 14 Grade 1, 5 Grade 2, 2 Grade 3, 1
Hughston et al. [27]  +  +  1 25 71.6 Excellent: 12 Good: 8, Fair: 3, Poor: 2
Rauschning [17]  + c +  2 15 22.3 Grade 0, 14 Clin. Exam. (Recurrent cyst), 1
Rupp et al. [15] 4 16 25.2 Visual analog scale Score 1: 2 Score 2: 2 Score 4: 1 Score 9: 2 Score 10: 9
  1. enlargement of unidirectional valvular slits, closed the communication between the articular and the cyst, correctly associated intra-articular disorders, excision of the cyst or removal of the cystic wall
  2. RL Rauschning and Lindgren knee score
  3. aSimply correctly associated intra-articular disorders
  4. bOnly 24 patients underwent a direct excisional cystectomy because the other 7 patients presented without fibrous structures
  5. cAssociated intra-articular disorders were corrected only in a few cases