Table 1 Variables under study

Demographics

Patient sex

Patient age

BMI

Age-adjusted Charlson Comorbidity Index (aCCI)

Previous surgery

Disease requiring emergency surgery

Diagnosis (acute diverticulitis, acute cholecystitis, obstructed hernia, other)

Hinchey grading

Tokyo grading

Site of hernia

Operative data

Amount of robotic surgeries performed in the institution (per year)

Surgeon expertise (robotic surgeries performed per year)

Robot model

Type of procedure

Time of intervention (what time of day was the surgery performed?)

Operative time

Intraoperative complications

Conversion

Reason of conversion

Drain

Recovery

Length of stay in ICU (stay in intensive care unit)

Clavien-Dindo

Type of complication

Treatment of complication

Death

Time to first flatus

Time to first mobilization

Time to first oral feeding

Length of stay

90-days mortality

90-days readmission

Theatre staff and consumable equipment (amount)

Ordinary consultant surgeons

Dedicated consultant surgeons

Ordinary non-consultant surgical assistants

Dedicated non-consultant surgical assistants

Ordinary anesthetic consultants

Dedicated anesthetic consultants

Ordinary non-consultant anesthetists

Dedicated non-consultant anesthetists

Ordinary theatre nurse scrubber

Dedicated theatre nurse scrubber

Ordinary theatre nurse circulating

Dedicated theatre nurse circulating

Ordinary portering staff

Dedicated portering staff

Maryland bipolar forceps

Fenestrated bipolar forceps

Permanent cautery hook

Cadiere forceps

Hot shears

Prograsp forceps

Vessel sealer

Harmonic ace

Staplers

Stapler reloads

Sutures

Drains

Hemostatic consumables

Diathermy consumables

Scrub suits

Dressings

Drapes