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Table 2 Odds ratio estimates in multivariable logistic regression for acute coronary syndrome by Firth’s penalized likelihood adjusted for DHA/AA ratio

From: Association between the ratio of serum n-3 to n-6 polyunsaturated fatty acids and acute coronary syndrome in non-obese patients with coronary risk factor: a multicenter cross-sectional study

 BMI group (BMI range)  
Low BMI (< 25)Moderate BMI (25–< 27.5)High BMI (≥27.5)
OR95% CIP valueOR95% CIP valueOR95% CIP value
Sex1.400.672.940.380.910.243.460.890.880.282.750.83
Age1.031.001.060.03*1.030.981.080.200.990.951.030.55
Smoking history2.481.414.360.00*1.470.544.010.450.960.362.520.93
HbA1c1.080.871.340.511.320.971.800.081.471.032.090.03*
CCB1.420.832.430.210.770.292.070.600.630.231.780.39
ARB1.060.621.830.831.080.422.770.870.480.171.330.16
LDL-C1.000.991.010.481.021.001.030.05*1.000.991.010.85
DHA/AA ratio0.310.130.750.01*0.630.133.100.571.980.488.240.35
  1. BMI body mass index, SE standard error, CI confidence interval, HbA1c hemoglobin A1c, CCB calcium channel blocker, ARB angiotensin II receptor blocker, LDL-C low-density lipoprotein cholesterol, DHA/AA ratio docosahexaenoic acid/arachidonic acid ratio
  2. * means P < 0.05. All models were fitted in complete cases who did not have missing data: event/n ratios were 61/812 (Low), 19/275 (Moderate), and 20/203 (High)