Merridown analysis

Summary

  • The final predictive model for CIMT Max included SBP, Hba1c and Homocystein, as well as the interaction between SPB and Hba1c.

  • SBP, Hba1c and Homocystein are all affected by Statin use and the use of BP medication

  • SBP is affected by Hba1c and Homosystein

  • Apoliprotein A1 is a significant predictor of Hba1c

  • Apoliprotein A1 shares significant relationships with HDL and Statin use.

Analysis of complete records/missing data

Across all patient records, there were no complete records for data collected between 2008 and 2013. To investigate the missing data structure, an indicator matrix was constructed with the same dimension as the dataset. Each entry was coded as a 0 or 1, depending on whether an observation was recorded.

Variable Obs_available percent.avail
1 ID 1508.00 100.00
2 year 1508.00 100.00
3 alt 623.00 41.31
4 ApoliA1 610.00 40.45
5 ApoliB 609.00 40.38
6 ast 622.00 41.25
7 BG 628.00 41.64
8 BMI 264.00 17.51
9 Chol_lower 275.00 18.24
10 CIMT_Max 1507.00 99.93
11 CIMT_Mean 1508.00 100.00
12 DBP 1343.00 89.06
13 ECGInterpretation 282.00 18.70
14 ExerciseECGInterpretation 236.00 15.65
15 Ferritin 491.00 32.56
16 FEV1 55.00 3.65
17 Fob 472.00 31.30
18 gamma_gt 623.00 41.31
19 hb 645.00 42.77
20 Hba1c 553.00 36.67
21 hct 651.00 43.17
22 HDL 224.00 14.85
23 Homocys 543.00 36.01
24 HR 8.00 0.53
25 LDL 222.00 14.72
26 Leucocytes 541.00 35.88
27 METSWATTS 239.00 15.85
28 MMSE 6.00 0.40
29 Plaque 43.00 2.85
30 psa 280.00 18.57
31 Q