Table 1 Characteristics of enrolled studies for meta-analysis
Author, Year | Enrollment period | Country | Center | Study design | Physical status | Types of surgery | Predictive criteria of difficult airways | Sample size | Female sex - no. (%) | Age - mean (sd) | BMI - kg/m2 |
|---|---|---|---|---|---|---|---|---|---|---|---|
Corso 2020 | Jan 2016 - Dec 2017 | Italy | Multicentric | Prospective observational study | ASA score ≥ 3 : 69% | Head and neck surgery: 57 (50%) Orthopedic surgery: 3 (2.6%) Bariatric surgery: 3 (2.6%) Urologic surgery: 6 (5.3%) General surgery: 45 (39.5%) | 2005 Italian guidelines and EGRI | 114 | 30 (26.4) | 56.0(13.6) | 30.9(5.1) |
Furyk 2017 | May 2015 - Jun 2016 | Australian | Single center | Prospective observational trial | ASA score 1 or 2 | Elective surgery which required oral endotracheal intubation | C&L: 3 or 4 | 23 | 14(60) | 52.4 (18.1) | 27.4 (4.1) |
McLean 2013 | Jun 2006 - Oct 2012 | US | Single center | Retrospective cohort study | / | Patients undergoing general anesthesia | / | 527 | / | ≥ 18 year old | / |
McManus 2018 | / | Australia | Single center | Prospective cohort study | Hypertension: 12 Chronic Renal Impairment: 2 Type 2 Diabetes: 2 Asthma: 1 COPD: 1 Obstructive Sleep Apnoea: 1 Arrhythmia: 1 | / | C&L 1: 4 Â C&L 2: 3 Â C&L 3: 9 Â C&L 4: 6 | 23 | 5(22) | 48.7 (17.1) | / |
Wise-Faberowski 2005 | / | US | Multicentric | Prospective observational trial | / | The most common surgical Procedure: cleft palate repair | Difficult intraoperative intubation; Airway edema secondary to surgical manipulation; Cervical immobility, or instability | 20 | 11 (55%) | 114 (75) months | / |