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. Author manuscript; available in PMC: 2015 Jan 21.
Published in final edited form as: Ann Transl Med Epidemiol. 2014;1(1):1004.

Table 3.

Comparison between Patients without Missing Covariates and Patients With Missing Covariates.

No Missing Mean Covariates Std With Missing Mean Covariates Std Δ p-value
N 71,999 102202
Metformin Use (%) 38.80 14.59 <0.001
Statin Use (%) 78.17 52.23 <0.001
Finasteride Use (%) 13.68 9.56 <0.001
Study Length (days) 2339.86 1009.37 1838.27 1268.99 <0.001
PCa (%) 5.22 5.68 <0.001
Age 66.91 10.22 71.94 10.15 <0.001
Black (%) 17.74 14.87 <0.001
Charlson 3.91 2.71 3.04 2.50 <0.001
Baseline A1c 6.51 0.96 6.65 1.16 <0.001
Mean A1c 6.57 0.90 6.52 1.02 <0.001
ΔA1C 0.06 0.83 −0.02 0.95 <0.001
Baseline LDL 106.71 27.09 105.06 28.92 <0.001
Mean LDL 89.22 25.00 90.29 26.95 <0.001
ΔLDL −17.49 24.77 −14.96 27.35 <0.001
Baseline BMI 30.98 4.98 30.54 7.01 <0.001
ΔBMI −1.02 3.15 −0.96 9.88 0.02
Maximum PSA 2.64 5.20 3.60 7.71 <0.001