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. 2021 Sep 28;2021(9):CD009790. doi: 10.1002/14651858.CD009790.pub2

Engbert 2011.

Study characteristics
Methods Study design: RCT
Setting: Germany, mixed
Exercise groups: 2
Comparison groups: 0
Participants Number of participants: 23 (E1 = 10, E2 = 13)
Chronic LBP duration: Not specified (not specified)
Neurological/radicular symptoms: No participants
Mean age (years): 51
Sex (female): 52%
Interventions Exercise Group 1 (E1): Therapeutic climbing on gym climbing wall with a focus on strengthening, stretching, mobilisation, co‐ordination and stabilisation of abdominal, back, pelvic, and leg muscles; type = mixed; duration = 4 weeks; dose = low; design = partially individualised; delivery = individual; additional intervention = none
Exercise Group 2 (E2): Strengthening, stretching, mobilisation, co‐ordination, and stabilisation for abdominal, back, pelvic, and lower limb muscles; type = mixed; duration = 4 weeks; dose = low; design = standardised; delivery = group; additional intervention = none
Outcomes Core outcomes reported: Pain (36‐Item Short Form Survey); function (Hannover Functional Ability Questionnaire); HRQoL (36‐Item Short Form Survey)
Follow‐up time periods available for syntheses: 4 weeks (short)
Notes Conflicts of interest: None to declare
Funding source: No funding received
Other: None
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk Participants were randomly assigned to the therapeutic climbing or the standard exercise training by means of a computer‐generated randomisation schedule.
Allocation concealment (selection bias) Unclear risk Numbered envelopes were prepared by a physical therapist not involved in the study and assigned to patients in a sequential order.
Blinding of participants and personnel (performance bias)
All outcomes Low risk Patients did not know which intervention was being evaluated.
Blinding of care provider (performance bias) High risk Not described
Blinding of outcome assessment (detection bias)
All outcomes Unclear risk Not described
Incomplete outcome data (attrition bias)
All outcomes Low risk Patients who did not attend more than 30% of treatment sessions were excluded from subsequent data analysis. Overall, five patients were excluded.
Participants analysed in group allocated (attrition bias) High risk Data analysis was based on 23 patients, 10 from the therapeutic climbing group and 13 from the standard exercise group.
Selective reporting (reporting bias) Low risk Support for judgement was not available.
Groups similar at baseline (selection bias) Low risk No significant differences in sex and age were noted between treatment groups.
Co‐interventions avoided or similar (performance bias) Unclear risk Participants of both groups were free to do unspecific exercise, such as walking, in their free time.
Compliance acceptable in all groups (performance bias) Low risk Patients who did not attend more than 30% of treatment sessions were excluded from subsequent data analysis.
Timing of outcome assessment similar in all groups (detection bias) Low risk Support for judgement was not available.