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. 2020 Jul 18;6(7):e04469. doi: 10.1016/j.heliyon.2020.e04469

Table 3.

Distribution of contingency tables by each exposure variable according to clinical outcome of amputation severity by diabetes mellitus, Fortaleza, Ceará, Brazil, 2017–2018.

Exposure Variables1 Categories LLA Severity2
Outcome 1
 Outcome 2
 Outcome 3
1 0 2 0 3 0
Age ≥67 46 46 65 46 49 46
<67 51 55 42 55 31 55
χ2 p = 0.902 p = 0.04 p = 0.051∗
Gender Male 64 49 55 49 58 49
Female 33 52 52 42 22 52
χ2 p = 0.019 p = 0.781 p = 0.002
Education Level Incomplete 31 37 38 37 33 37
Elementary 49 50 52 50 35 50
Illiterate 17 14 17 14 12 14
χ2 p = 0.688 p = 0.919 p = 0.74
City Rural 40 41 52 41 39 41
Fortaleza 57 60 55 60 41 60
χ2 p = 1 p = 0.307 p = 0.344
PKDM No 10 16 26 16 4 16
Yes 87 85 81 85 76 85
χ2 p = 0.346 p = 0.178 p = 0.038
Smoking Yes 53 54 55 54 44 54
No 44 47 52 47 36 47
χ2 p = 0.982 p = 0.25 p = 0.956
Alcoholism Yes 37 33 41 33 44 33
No 60 68 66 68 36 68
χ2 p = 0.512 p = 0.481 p = 0.004
CVD Yes 30 28 58 28 34 28
No 67 73 49 73 46 73
χ2 p = 0.735 p < 0.001 p = 0.055
SAH Yes 61 74 85 74 63 74
No 36 27 22 27 17 27
χ2 p = 0.157 p = 0.376 p = 0.497
Glucometer No 47 52 63 52 22 52
Yes 50 49 44 49 58 49
χ2 p = 0.776 p = 0.351 p = 0.002
Daily use of Gl. No 70 79 92 79 55 79
Yes 27 22 15 22 25 22
χ2 p = 0.411 p = 0.2 p = 0.203
Hypoglycemic No 26 30 41 30 21 30
Yes 71 71 66 71 59 71
χ2 p = 0.768 p = 0.245 p = 0.729
Insulin No 52 56 72 56 29 56
Yes 45 45 35 45 51 45
χ2 p = 0.907 p = 0.107 p = 0.016
Freq.-Primary Care Never 25 25 45 25 22 25
Rarely 13 19 13 19 10 19
Regularly 59 57 49 57 48 57
χ2 p = 0.583 p = 0.026 p = 0.512
Primary Care No 60 62 86 62 55 62
Yes 37 39 21 39 25 39
χ2 p = 1 p = 0.004 p = 0.383
1

Supplementary information on exposure variables:(1) Age, variable age recoded to greater than and less than 67 years (mean sample age);(2) PKDM, prior knowledge of diabetes mellitus;(3) CVD, cardiovascular disease;(4) SAH, systemic arterial hypertension;(5) LLA severity, severity of lower limb amputations caused by DM;(6) Daily use of Gl., Daily use of glucometer;(7) Freq.-Primary Care, primary care attendance frequency;(8) Primary Care, specific guidance on amputation in primary care DM.

2

AMP severity, severity of amputations caused by diabetes mellitus:(1) Outcome = 0 (Toe);(2) Outcome = 1 (Transmetatarsal and Infrapatellar);(3) Outcome = 2 (Suprapatellar);(4) Outcome = 3 (Disarticulation and Bilateral).

∗

Results of chi-squared (χ2) tests with probability <0.2 were used as criteria for selection of exposure variables for the step of single and multiple regression models with P (outcome) ~ Poisson.