Table 2 Association between baseline obesity parameters and the primary outcome in stage 3–4 chronic kidney disease. Comparison performed using Cox proportional hazards modelling to compare body mass index, waist circumference and conicity index with the composite outcome of doubling of serum creatinine, commencement of renal replacement therapy or all-cause mortality

 <18.5

15 (1.8)

0.54 (0.17-1.71)

0.43 (0.2-1.99)

0.57 (0.14-2.38)

0.74 (0.17-3.19)

 18.5-24.9

174 (20.7)

1.00 (referent)

1.00 (referent)

1.00 (referent)

1.00 (referent)

 25-29.9

293 (34.8)

0.57 (0.39-0.81)**

0.55 (0.38-0.79)**

0.58 (0.40-0.85)**

0.50 (0.33-0.75)**

 30-39.9

288 (34.2)

0.63 (0.44-0.90)*

0.65 (0.46-0.93)*

0.71 (0.49-1.03)

0.62 (0.41-0.93)*

 ≥40

72 (8.6)

0.74 (0.44-1.24)

0.82 (0.49-1.39)

0.96 (0.56-1.65)

0.94 (0.52-1.69)

 M: <98.5, F < 90

197 (33.2)

1.00 (referent)

1.00 (referent)

1.00 (referent)

1.00 (referent)

 M: 98.5-110, F: 90-101

198 (33.3)

1.23 (0.83-1.82)

1.14 (0.75-1.65)

1.31 (0.86-1.97)

0.99 (0.63-1.56)

 M > 110, F: >101

199 (33.5)

0.87 (0.57-1.33)

0.89 (0.58-1.35)

1.00 (0.64-1.57)

0.87 (0.54-1.41)

 <1.291

196 (33.3)

1.00 (referent)

1.00 (referent)

1.00 (referent)

1.00 (referent)

 1.291-1.372

196 (33.3)

1.14 (0.74-1.80)

1.03 (0.67-1.59)

1.03 (0.65-1.63)

1.13 (0.68-1.86)

 >1.372

196 (33.3)

1.59 (1.05-2.39)*

1.46 (0.96-2.20)

1.39 (0.88-2.22)

1.16 (0.69 -1.95)