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Table 5 Factors associated with length of stay per admission among children experiencing potentially preventable hospitalisations during the first two years of life: results from the negative binomial regression models

From: Poverty related risk for potentially preventable hospitalisations among children in Taiwan

Disease category All five Diseases Gastroenteritis and dehydration Asthma and chronic bronchitis Acute upper respiratory infections Lower respiratory infections Acute injuries and poisonings
Explanatory variable
  IRR 95%CI IRR 95%CI IRR 95%CI IRR 95%CI IRR 95%CI IRR 95%CI
Economic status (reference: high income)
   Poverty 1.26 ** 1.18-1.36 1.25 ** 1.10-1.41 0.99   0.73-1.33 1.19 ** 1.05-1.36 1.18 ** 1.10-1.26 1.82   0.94-3.53
   Near poverty 1.04 ** 1.02-1.07 1.04 * 1.01-1.08 1.13   1.00-1.27 1.02   0.98-1.05 1.04 ** 1.01-1.07 0.92   0.75-1.13
   Middle income 1.01   0.99-1.03 1.01   0.98-1.04 1.12 * 1.00-1.26 1.02   0.99-1.05 1.02   0.99-1.04 0.80 * 0.66-0.96
Geographic environment (reference: big city)
   Small city/town 1.00   0.98-1.02 0.99   0.96-1.02 1.02   0.88-1.19 1.01   0.98-1.04 1.00   0.98-1.02 1.04   0.88-1.21
   Rural area 1.00   0.98-1.02 1.00   0.97-1.03 0.91   0.80-1.03 1.00   0.97-1.03 1.00   0.97-1.03 0.99   0.86-1.14
Physical conditions at birth
   Male 1.03 ** 1.01-1.05 1.01   0.98-1.03 0.98   0.87-1.10 1.00   0.98-1.02 1.03 ** 1.01-1.05 0.99   0.88-1.11
   Low birth weight 1.27 ** 1.21-1.33 1.12 ** 1.03-1.21 1.29 * 1.01-1.65 1.05   0.98-1.14 1.25 ** 1.18-1.31 0.82   0.60-1.13
   Number of outpatient visits in the first week of life 1.00   0.98-1.03 1.01   0.97-1.05 1.06   0.91-1.23 1.03   1.00-1.06 1.00   0.97-1.04 0.93   0.79-1.09
Additional physical conditions related to potentially preventable hospitalisations before age two
   Number of outpatient visits for the same disease before age two 1.00 ** 1.00-1.00 1.01 ** 1.00-1.01 1.01 ** 1.00-1.02 1.00 ** 1.00-1.00 1.00 ** 1.00-1.00 1.05 ** 1.04-1.06
Access to preventive care
   Number of well-child care visits before age two 0.97 ** 0.96-0.98 0.98 ** 0.97-0.99 0.99   0.96-1.01 0.99   0.99-1.00 0.97 ** 0.96-0.98 0.93 ** 0.90-0.97
Number of observations 63,796   11,896   685   10,154   39,146   1,915  
Number of clusters 42,182   10,752   600   9,219   27,283   1,840  
Model significance: Wald Χ2(10) 452.77 ** 76.99 ** 25.10 ** 38.57 ** 393.17 ** 116.46 **
  1. IRR: incidence-rate ratio.
  2. CI: confidence interval.
  3. * p < 0.05; ** p < 0.01.