Table 1.

Eligibility criteria in chronological inclusion order

Population	Patients (humans) with slow‐transit constipation aged ≥ 18 years. If patients < 18 years were included, only outcomes assessed in participants ≥ 18 years were extracted
Intervention	Any treatment of constipation such as laxatives, biofeedback, physical exercise, subtotal colectomy, and sacral neuromodulation
Comparator	Any treatment of constipation such as laxatives, biofeedback, physical exercise, subtotal colectomy, and sacral neuromodulation or placebo, or a different patient group as comparator, or no control group
Outcome	Safety, efficacy, or effectiveness of constipation treatment, measured with any outcome
Study type	Case studies, cohort studies (prospective and retrospective), case–control studies, noncontrolled trials, cross‐over studies, and ([non]randomized controlled) trials
Language	English
Outcome reporting quality	Studies were excluded when it was unclear which outcomes were used and/or how outcomes were measured
Publication status	Published
Publication year	No restriction
Publication type	Full‐text articles (no conference abstracts)