Table 3.

Changes in risk discrimination for colon cancer risk for men and women after addition of anthropometric measures to the null model

Null modelBMIaWaist circumferenceWHRbHip circumferenceBMIa + waist circumferenceBMIa + WHRbBMIa + hip circumference
Men
 −2 log L33,666.833,640.933,627.833,654.833,642.533,627.433,637.033,636.6
 AIC33,746.833,722.933,709.833,736.833,724.533,711.433,721.033,720.6
 C-index0.7455 (0.6996, 0.7889)0.7380 (0.6916, 0.7818)0.7339 (0.6874, 0.7780)0.7425 (0.6964, 0.7861)0.7376 (0.6913, 0.7815)0.7338 (0.6873, 0.7779)0.7371 (0.6907, 0.7810)0.7363 (0.6899, 0.7803)
 C-index changeReference−0.0076 (−0.0079, −0.0071)−0.0116 (−0.0122, −0.0109)−0.0030 (−0.0032, −0.0029)−0.0079 (−0.0083, −0.0074)−0.0117 (−0.0123, −0.0110)−0.0085 (−0.0089, −0.0080)−0.0092 (−0.0097, −0.0087)
Women
 −2 log L14,974.214,973.814,974.214,997.214,974.214,973.614,973.814,973.0
 AIC15,058.215,059.815,060.215,060.215,060.215,061.615,061.815,061.0
 C-index0.6833 (0.6112, 0.7512)0.6828 (0.6107, 0.7507)0.6832 (0.6112, 0.7512)0.6833 (0.6112, 0.7512)0.6834 (0.6113, 0.7513)0.6827 (0.6106, 0.7507)0.6827 (0.6107, 0.7507)0.6825 (0.6104, 0.7505)
 C-index changeReference−0.0005 (−0.0006, −0.0005)−0.0001 (−0.0001, −0.0001)0.0000 (0.0000, 0.0000)0.0001 (0.0001, 0.0001)−0.0006 (−0.0006, −0.0006)−0.0005 (−0.0006, −0.0005)−0.0008 (−0.0009, −0.0008)

NOTE: Null model included age at baseline (continuous), education (less than 12 y, 12 y or high school, post-high school or some college, college graduate, or postgraduate), race/ethnicity (Caucasian or non-Caucasian), smoking status (never smoker, former smoker with 20 cig./d or less, former smoker with more than 20 cig./d, current smoker with 20 cig./d or less, or current smoker with more than 20 cig./d), marital status (married or living as married, divorced, widowed, separated, or never married), physical activity (never or rarely, 1 to 3 times/mo, 1 to 2 times/wk, 3 to 4 times/wk, 5 or more times/wk), NSAID use (yes or no), family history of colorectal cancer (yes or no), diabetes status (yes or no), dietary intakes of total energy, fiber, folate, calcium, red meat, fruits and vegetables (all in quartiles), alcohol (yes or no), HRT (never, current, or past).

Abbreviations: AIC, Akaike Information Criterion; −2 log L, −2 log likelihood.

  • aWeight/height2.

  • bWaist circumference/hip circumference.