Table 4

Proportional hazards models for coronary outcomes using various measures of cholesterol, including only significant covariates in the models

Time-dependent covariate models


Most recent TC

Mean TC

Time-adjusted

mean TC

HR

(95% CI)

P

HR

(95% CI)

P

HR

(95% CI)

P

Cholesterol (TC)

1.86

(1.30, 2.68)

0.001

2.07

(1.28, 3.36)

0.003

2.07

(1.28, 3.34)

0.003

Male sex

1.90

(1.06, 3.41)

0.03

1.83

(1.01, 3.29)

0.046

1.82

(1.01, 3.29)

0.047

Ageψ

1.12

(1.07, 1.17)

< 0.0001

1.13

(1.06, 1.20)

< 0.0001

1.13

(1.06, 1.20)

< 0.0001

SLEDAI-2K

1.09

(1.05, 1.13)

< 0.0001

1.10

(1.06, 1.14)

< 0.0001

1.10

(1.06, 1.14)

< 0.0001

Corticosteroidsβ

2.04

(1.20, 3.45)

0.01

2.01

(1.19, 3.41)

0.01

2.01

(1.19, 3.41)

0.01


95% CI, 95% confidence interval; AUC, area under the curve; BP, blood pressure (mm Hg); DBP: diastolic blood pressure (mm Hg); HR, hazard ratio; NS, not significant; P, P value; SBP, systolic blood pressure (mm Hg); TC, total plasma cholesterol (mmol/L).

ψYears; age at the time of first available TC (or SBP or DBP) in time-constant models and coincident with each TC (or SBP or DBP) measurement in the time-dependent covariate models. SLE Disease Activity Index 2000; scores range from 0 to 105, with higher scores indicating more-active disease; measured at the time of first available TC (or SBP or DBP) in time-constant models, and coincident with each TC (or SBP or DBP) measurement in the time-dependent covariate models. ¢Hypertension defined as diastolic BP ≥ 90 or systolic BP ≥ 140 mm Hg; defined as present ever during the study in time-constant models, and coincident with each TC measurement in the time-dependent covariate models. βCorticosteroids defined as used ever during the study in time-constant models, and coincident with each TC (or SBP or DBP) measurement in the time-dependent covariate models. ζElevated total plasma cholesterol (hypercholesterolemia) defined as total plasma cholesterol > 5.2 mmol/L; measured at the time of first available SBP or DBP in time-constant models, and coincident with each SBP or DBP measurement in the time-dependent covariate models. §Antimalarials include chloroquine and hydroxychloroquine; defined as used ever during the study in time-constant models, and coincident with each TC (or SBP or DBP) measurement in the time-dependent covariate models. ¥Immunosuppressives include methotrexate, azathioprine, mycophenolate mofetil, cyclosporine, and cyclophosphamide; defined as used ever during the study in time-constant models, and coincident with each TC (or SBP or DBP) measurement in the time-dependent covariate models.

Nikpour et al. Arthritis Research & Therapy 2011 13:R156   doi:10.1186/ar3473

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