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Table 1 Results of the negative binomial model of the 5 years cross-sectional data

From: Household presentation of acute gastroenteritis in a primary care sentinel network: retrospective database studies

VariableReference/ComparisonIRR95% CIp-value
< 5 years old in householdNo < 5 years old in household12.4(11.3–13.7)< 0.001
IMD QuintileIMDQ1   
 IMDQ2 0.73(0.59–0.89)< 0.001
 IMDQ3 0.66(0.53–0.82)< 0.001
 IMDQ4 0.76(0.62–0.94)0.01
 IMDQ5 0.68(0.55–0.84)< 0.001
 Black 0.51(0.35–0.75)< 0.001
 Mixed 0.69(0.42–1.13)0.14
 Other 1.03(0.59–1.79)0.93
 White 0.64(0.5–0.81)< 0.001
Urban Rural ClassificationTown & City (suburban)   
 Conurbation 0.76(0.61–0.97)0.03
 Rural 1.17(0.95–1.43)0.13
NHS RegionLondon   
Midlands & East 0.47(0.36–0.63)< 0.001
 North 0.50(0.40–0.63)< 0.001
 South 0.60(0.46–0.80)< 0.001
Year 0.96(0.92–1.0)0.2
  1. Table 1 describes findings from the negative binomial model of the cross- sectional data. In the 5 years (2013–2017), there were 4346 incidence cases of AGE. The presence of a child under 5-years old in the household leads to an over 12-fold (12.20, 95% CI 11.08–13.44) increase in the expected count of events (p < 0.001), compared to a household without an under 5-year old resident. Compared to the most deprived quintile other quintiles show a reduction in incidence (e.g. the least deprived Quintile 5 shows a reduction in incidence of about 27% (IRR: 0.63, 95% CI 0.52–0.76). Compared with the reference category City and town (medium density suburban housing), conurbations (highest population density) showed a decrease in incidence by 24%. A rural setting did not show any difference. All the other NHS Regions had lower rates of household incidence, around half that of London (p < 0.0001). The observed fall per year in incidence rates was not statistically significant
  2. IRR incidence rate ratio, CI confidence interval, IMD index of multiple deprivation