Table 1 PICOS Search

P (patient, problem, population)

Patient underwent orthopaedic surgeries

I (intervention)

Evaluation of effect of laminar airflow ventilation system in the prevention of surgical site infections (SSIs) in operating room

C (comparison, control or comparator)

Comparison of operating rooms with or without laminar air flow

O [outcome (s)]

laminar airflow ventilation system is not effective in the prevention of surgical site infections (SSIs) in operating room

S (study type)

Randomized controlled trials, cohort study, comparative study, prospective study, retrospective study