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. Author manuscript; available in PMC: 2015 Nov 11.
Published in final edited form as: Obes Surg. 2013 Jan;23(1):93–102. doi: 10.1007/s11695-012-0802-1

Table 3.

Predictors of relapse of type 2 diabetes following complete remission (Cox proportional hazards modeling of time from initial complete remission until relapse) a,b

Unadjusted Hazard Ratio Estimates Adjusted Hazard Ratio Estimates
N 2,254 2,254
Age at surgery, 5 year increase 1.13 (1.08, 1.19) 1.09 (1.04, 1.15)
Female 0.99 (0.8, 1.23) 1.14 (0.91, 1.42)
HbA1c Category at surgery
    Below 6.5% 1 (referent) 1 (referent)
    [6.5%, 8%) 1.19 (0.94, 1.52) 1.34 (1.04, 1.71)
    [8%, 9%) 1.47 (1.07, 2.03) 1.43 (1.03, 1.97)
    [9%, 10%) 2.05 (1.41, 2.97) 1.95 (1.34, 2.84)
    10% and higher 2.19 (1.52, 3.15) 2.07 (1.42, 3.02)
On oral medication at surgery 1.39 (1.13, 1.72) 1.37 (1.10, 1.70)
On insulin at surgery 2.54 (2.00, 3.21) 1.91 (1.48, 2.45)
Years since DM diagnosis, 1 year increase 1.18 (1.14, 1.22) 1.13 (1.09, 1.17)
a

Unadjusted and adjusted models each stratified the baseline hazard function on year of surgery and study site. The adjusted model additionally includes all covariates shown

b

HbA1c, hemoglobin A1c; diabetes type 2 diabetes mellitus