Socio-demographic characteristics
Out of 376 children's clinical profile reviewed, 354 were enrolled in the study. The rest of sample 22 (5.8) was incomplete data. From 354 children, more than half 159 (55.1%) were males and more than half 189 (53.4) of them were from a rural area. The mean age of the children at the time of DM diagnosis was 8.21 years with SD ±3.94 years (Table 1).
Table 1: Socio-demographic characteristics of DM diagnosed children at East &West Gojjam Zone referral hospitals, Northwest Ethiopia, 2019
Variable
|
Frequency N(354)
|
Percent %
|
Sex
|
Male
|
195
|
55.1
|
Female
|
159
|
44.9
|
Residence
|
Urban
|
165
|
46.6
|
Rural
|
189
|
53.4
|
Age
|
<5year
|
93
|
26.3
|
5 -9year
|
116
|
32.8
|
>=10 year
|
145
|
41.0
|
Clinical characteristics
The majority of the 295 (83.3%) of children have normal weight for age. Around 258 (72.9%) have no family history of DM. The majority of children 317(89.5%) were diagnosed with type 1 DM, the rest were type 2 DM. About one-third of participants 119(33.6%) have got preceding infection; of which 346(97.7%) had upper respiratory tract infection (URTI) followed by 53 (15 %) skin fungal infection including (tinea capitis 46(86.8%), Tinea corporis 5(9.4%) and cutaneous candidiasis 2(3.8%)) and 19(5.4%) pneumonia (Table 2).
Table 2 Clinical characteristics of DM diagnosed children at East &West Gojjam Zone referral hospitals, Northwest Ethiopia, 2019
Variable
|
Frequency (354)
|
Percent %
|
Weight for age
|
Normal
|
295
|
83.3
|
Underweight
|
58
|
16.4
|
Overweight
|
1
|
0.3
|
Weight for height
|
Normal
|
306
|
86.4
|
Underweight
|
48
|
13.6
|
Preceding infection
|
Fungal skin infection
|
53
|
15
|
Pneumonia
|
19
|
5.4
|
Tuberculosis
|
3
|
0.8
|
Tonsillitis
|
5
|
1.4
|
Gastroenteritis
|
15
|
4.2
|
Urinary tract infection
|
14
|
4
|
Hepatitis
|
5
|
1.4
|
Otitis media
|
7
|
2
|
Chickenpox
|
2
|
0.6
|
Meningitis
|
1
|
0.3
|
Upper respiratory tract infection
|
346
|
97.7
|
Other
|
18
|
5.1
|
Nearly one-third of children 120 (33.9%) had an acute illness at the time of DKA development. Of which 53 (14.97%) had pneumonia followed by urinary tract infection (UTI) 28 (7.9%) and gastroenteritis 22 (6.2 %) (Figure: 1). About 92 (26.0%) of children had comorbidity of which 55 (15.5%) had severe acute malnutrition (SAM) (Figure: 2) and 105 (29.7%) of children were hypoglycemic, 4 (1.1%) had acute kidney injury and 1 (0.3%) had chronic kidney injury after starting to follow up for DM.
Treatment-related variables of DM diagnosed children
A diabetes care team is simply composed of a physician/general practitioners, and one compressive nurse and type of diabetes teaching/education given in our setting is one-on-one training is given in the hospital by nurses at their first diagnosis of diabetes on nutritional management, insulin injection techniques, exercise, and self-monitoring of blood glucose. One-fourth 171 (48.3%) of the children had a history of medication adherence and about 333 (94.5) children used insulin and 8 (2.3%) used hypoglycemic agents for treatment, but, about 13 (3.7%) not take any drug. About 247 (69.77 %) children stored insulin appropriately at home and about three-fourth 265 (74.9) of the children had poor glycemic control.
Incidence of diabetic ketoacidosis after DM diagnosis
Out of 354 children enrolled, 207 (58.5%) were developed DKA, with a mean follow up time of 25.72 months with 95% CI (24.1, 27.43). The children have followed a minimum of 1 month and a maximum of five years. The incidence rate of DKA was calculated using cases/month as a denominator for the entire cohort. The overall incidence rate of DKA in the cohort was 2.27 cases per 100 children per month. The median survival time of the entire cohort was found to be 35.6 months (IQR: 18.6, 49.2). When time is gone the hazard of developing DKA is going to high which is well described through hazard estimate (figure 3).
Long rank test to compare survival curves
The test statistics showed that there was a significant difference in survival function for different categorical variables. These variables include age, family history, missed follow up, from preceding infection; tonsillitis, gastroenteritis, and meningitis, from acute recent illness at the time of DKA; upper respiratory tract infection, pneumonia, tonsillitis, gastroenteritis, and otitis media, children with severe malnutrition, types of drug used, medication adherence and insulin storage at home.
The median survival time for those having a history of inappropriate insulin storage at home was 33.3 months with CI (25.3, 38.1) and the median survival time for those who had a history of appropriate insulin storage at home was 35.8 months with 95% CI (30.5, 42.3). The survival time difference between the groups was found statically significant with a P-value of 0.0002 (Figure 4). In addition, the median survival time for those who had a history of medication adherence was 44.3 months with 95% CI (36.9, 50.5) and the mean survival time for those who had a history of medication non-adherence was 27.5 months with 95% CI (23.6, 33.9). The survival time difference between the groups was found statically significant with P < 0.001 (Figure 5).
Predictor of Diabetic ketoacidosis
The final multivariate cox proportional hazard adjusted model revealed that, the hazard of diabetic ketoacidosis decreased by 13.4% as age increased by one year (95% CI (2.34, 5.709). The hazard of Diabetic ketoacidosis was 3.52 times in children age < 5 years than those aged >10 years (95% CI (2.25, 5.49). Also, the hazard of DKA in children who have preceding gastroenteritis was 2.18 times more than those who have no preceding gastroenteritis (95% CI (1.07, 4.45). Similarly, the hazard of DKA in children who have an upper respiratory tract infection at the time of DKA development was 2.22 times more than those who have no respiratory tract infection at the time of DKA development 95% CI (1.109, 4.45). The hazard of DKA was 1.36 times more in children who have a history of inappropriate insulin storage at home than those children who had a history of appropriate insulin storage at home 95% CI (1.008, 1.85). Lastly, the hazard of DKA in children who have a history of medication non-adherence was 1.54 times more than in children who have a history of medication adherence 95% CI (1.11, 2.14) (table:3).
Table 3: Cox regression analysis for predictors of DKA
Variable
|
Survival status
|
CHR (95% CI)
|
P-value
|
AHR (95% CI)
|
Event
|
Censor
|
Age
|
<5
|
59
|
34
|
4.58 (3.07, 6.82)
|
<0.001*
|
3.52 (2.25, 5.49)
|
|
5-10
|
87
|
61
|
1.76 (1.18, 2.62)
|
0.065
|
1.47 (0.97, 2.24)
|
>10
|
61
|
52
|
1
|
|
1
|
Sex
|
Male
|
111
|
84
|
|
|
1
|
Female
|
96
|
63
|
0.83(0.6, 0.097)
|
0.185
|
0.82(0.61,1.09)
|
Missed follow up
|
Yes
|
88
|
48
|
|
|
|
No
|
119
|
99
|
0.75(0.57, 0.99)
|
0.172
|
0.81(0.61,1.09)
|
Insulin storage
|
Appropriate
|
105
|
142
|
1
|
|
1
|
Inappropriate
|
102
|
5
|
1.98(1.51, 2.62)
|
0.044 *
|
1.36 (1.008,1.85)
|
Adherence
|
Yes
|
61
|
110
|
1
|
|
1
|
No
|
146
|
37
|
2.18(0.95, 2.95)
|
0.01*
|
1.54(1.11,2.14)
|
Recent acute illness
|
Pneumonia
|
Yes
|
50
|
3
|
0.62(0.42, 0 .91)
|
0.615
|
1.09 (0.75,1.59)
|
No
|
157
|
144
|
1
|
|
1
|
upper respiratory tract infection
|
Yes
|
13
|
-
|
2.44(1.39, 4.31)
|
0.024*
|
2.22(1.109, 4.45)
|
No
|
194
|
147
|
1
|
|
1
|
Tonsillitis
|
Yes
|
3
|
-
|
3.06(0.97, 9.64)
|
0.800
|
1.29 (0.174, 9.60)
|
No
|
204
|
147
|
1
|
|
|
Gastroenteritis
|
Yes
|
20
|
2
|
1.69(1.06, 2.68)
|
0.907
|
1.035 (0.57,1.87)
|
No
|
187
|
145
|
1
|
|
|
urinary tract infection
|
Yes
|
43
|
-
|
1.61(1.15, 2.25)
|
0.923
|
1.73 (0.67,1.41)
|
No
|
164
|
147
|
1
|
|
1
|
otitis media
|
Yes
|
11
|
-
|
1.98(1.08, 3.65)
|
0.194
|
1.54 (0.801,2.92)
|
No
|
196
|
147
|
1
|
|
1
|
skin fungal infection
|
Yes
|
13
|
-
|
1.67(0.95, 2.94)
|
0.096
|
1.73(0.90,3.30)
|
No
|
194
|
147
|
1
|
|
|
Preceding infection
|
tuberculosis
|
Yes
|
3
|
-
|
2.91(0.92, 0.16)
|
0.071
|
3.7(0. 89 – 15.85)
|
No
|
204
|
147
|
1
|
|
1
|
Tonsillitis
|
Yes
|
5
|
-
|
2.67 (1.09, 6.52)
|
0.498
|
1.82(0.32,10.39)
|
No
|
202
|
147
|
1
|
|
1
|
gastroenteritis
|
Yes
|
12
|
3
|
2.27 (1.26, 4.09)
|
0.032*
|
2.18(1.07, 4.46)
|
No
|
195
|
144
|
1
|
|
1
|
urinary tract infection
|
No
|
11
|
3
|
1.68(0.91, 3.09)
|
0.189
|
1.58(0.79, 3.15)
|
Yes
|
196
|
144
|
1
|
|
1
|
Meningitis
|
Yes
|
1
|
-
|
8.28
|
0.316
|
0.18(0.006, 5.13)
|
No
|
206
|
147
|
1
|
|
1
|
other infections
|
Yes
|
12
|
6
|
1.41(0.78, 2.54)
|
0.446
|
1.27(0.68, 2.08)
|
No
|
195
|
141
|
1
|
|
1
|
Having sever acute malnutrition
|
Yes
|
42
|
13
|
1.41(1.004,1.98)
|
0.901
|
1.02(0.69, 1.50)
|
No
|
165
|
134
|
1
|
|
1
|
Keynote * variables which were significant at p-value < 0.05 and - mean 0 observation