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BackgroundThe United States (US) data suggest fewer-than-expected preterm births in 2020, but no study has examined the impact of exposure to the early COVID-19 pandemic at different points in gestation on preterm birth.ObjectiveOur objective was to determine-among cohorts exposed to the early COVID-19 pandemic-whether observed counts of overall, early and moderately preterm birth fell outside the expected range.MethodsWe used de-identified, cross-sectional, national birth certificate data from 2014 to 2020. We used month and year of birth and gestational age to estimate month of conception for birth. We calculated the count of overall (

Additional file 1.

Additional file 2: Table S2. Factor loading matrix for the three dietary patterns identified in this sample of Australian adults (n = 251). Table S2 shows the full factor loading matrix (for values > 0.2) for each of the three dietary patterns for all of the 34 food groups, including those food groups which don’t load on any pattern.

Additional file 1: Table S1. The 34 food sub-groups used in the analysis. For dietary pattern analysis, all food and drinks were assigned to food groups on the basis of the food grouping system developed by Food Standards Australia New Zealand (FSANZ) which has 20 major food groups. According to similarities in food nutrient profiles, several major food groups were combined or spilt based on key nutrients resulting in 34 sub food groups. This table shows the final 34 food sub groups used in dietary pattern analysis.