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Table 1 King’s obesity staging criteria as applied in the 2142 consecutive treatment seeking patients with morbid obesity

From: The association between severity of King’s Obesity Staging Criteria scores and treatment choice in patients with morbid obesity: a retrospective cohort study

Criteria Stage 0
Normal health
Stage 1
At risk of disease
Stage 2
Established disease
Stage 3
Advanced disease
A Airways Normal
Neck < 43 cm
Mild OSA
Neck ≥ 43 cm
Requires CPAP -
B BMI NAa 35-39.9 kg/m2 40-50 kg/m2 >50 kg/m2
C CV-risk <10% 10-19% ≥20%
Stable CAD
D Diabetes FPG < 5,6
HbA1 < 5,7
HbA1c 5.7-6.4%
HbA1c < 9%
HbA1c ≥ 9%
E Economic complications None None Workplace disadvantage Disabled
F Functional limitation ≥3 h moderate physical activity/week 1-2 h moderate physical activity/week <1 h moderate physical activity/week -
G Gonadal dysfunctionb Normal Hyperandrogenemiac PCOSd -
H Perceived Health status, body Image Normal Anxiety/depression without medication Psycoactive drugs
Eating disorder
  1. OSA, obstructive sleep apnea, COPD, chronic obstructive pulmonary disease, CPAP, continuous positive airway pressure, BMI, body mass index, CV-risk, ten years risk of cardiovascular disease (Framingham risk assessment), CAD, coronary artery disease, FPG, fasting plasma glucose, IFG, impaired fasting glucose, DM2, diabetes mellitus type 2, PCOS, polycystic ovarian syndrome
  2. a Patients with BMI < 35 kg/m2 (n = 42) were excluded from the analysis since they did not fulfil the criteria for bariatric surgery
  3. bFemale participants
  4. cHyperandrogenemia denotes a free testosterone index (FTI) above the normal range (FTI > 0.6). FTI was calculated by the formula 100 x serum testosterone (nmol/L) / sex hormone binding globulin (SHBG, nmol/L)
  5. dWomen with known PCOS and those with an FTI > 0.6 or hirsutism combined with oligo- / anovulation were classified as having PCOS