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Statistical analysis

DP Dharshni Pillay
LN Lerusha Naidoo
KS Khine Swe Swe-Han
YM Yesholata Mahabeer
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Descriptive statistics were used to summarise the data. Categorical data were summarised by frequencies and percentage. The frequency of selected organisms was reported by year. Susceptibility of each drug was reported as the percentage susceptible. Frequency was calculated as a measure of the total number of samples in the data series. The number of each organism seen per year is a count variable. Comparisons of pathogens by subgroup, such as early-onset and late-onset neonatal sepsis, was done using Chi Square or Fisher’s exact test. Temporal trends in the number of organisms and antimicrobial susceptibility patterns over time were analysed using Poisson and logistic regression. Stata V13.1 was used for the data analysis and p-value of 0.05 was considered statistically significant.

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