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Table 1 Demographic and illness characteristics of children aged less than 2 years admitted to hospital with an infectious disease from 1st January 2005 to 31st December 2011

From: Hospital readmissions with acute infectious diseases in New Zealand children < 2 years of age

 

Children admitted to hospital with an infectious disease before age 2 years

Variable

n = 46,540

Demographic characteristics

Age in months, median (IQR)

7.2 (2.4–13.2)

Age, n (%)

 

 Less than 6-months-old

19,028 (41)

 6- to 23-months-old

27,512 (59)

Gender, n (%)

 

 Male

26,038 (56)

 Female

20,502 (44)

Ethnicitya, n (%)

 

 Pacific

7902 (17)

 Māori

15,876 (34)

 Asian

2499 (5)

 Other

740 (2)

 European

19,411 (42)

Household deprivationb, n (%)

 

 Dep 9 & 10 (most deprived)

18,575 (40)

 Dep 7 & 8

10,996 (24)

 Dep 5 & 6

7226 (16)

 Dep 3 & 4

5171 (11)

 Dep 1 & 2 (least deprived)

4435 (10)

Season of admissionc, n (%)

 

 Autumn

8586 (18)

 Winter

17,285 (37)

 Spring

13,162 (28)

 Summer

7507 (16)

Illness characteristics

Length of stay in days, median (25th, 75th centile)

3 (2, 4)

Diagnostic group of first admission, n (%)

 

 Acute respiratory infection (ARI)

25,256 (54)

 Enteric infection

6909 (15)

 Skin and soft tissue infection (SSTI)

3210 (7)

 Urinary tract infection (UTI)

1826 (4)

 Other

9339 (20)

Presence of complex chronic conditions, n (%)

 

 All complex chronic conditions

894 (2)

 Neuromuscular

45 (0.1)

 Cardiovascular

403 (0.9)

 Respiratory

116 (0.2)

 Renal

43 (0.1)

 Gastrointestinal

78 (0.2)

 Haematologic and immunologic

38 (0.1)

 Metabolic

3 (0.01)

 Other congenital or genetic defect

133 (0.3)

 Malignancy

35 (0.1)

  1. aEthnicity not stated, n = 112
  2. bArea-level socio-economic deprivation was measured using the NZ Index of Deprivation (NZDep06), grouped into quintiles [18]. Data were missing for 137 (0.2%) children
  3. cAutumn = March to May; Winter = June to August; Spring = September to November; Summer = December to February
  4. CI Confidence interval
  5. IQR Interquartile range