Question 1. [7 marks] This question relates to the following extract of a table from an article by Hui et al titled 'Increase in preterm stillbirths in association with reduction in iatrogenic preterm births during COVID-19 lockdown in Australia: a multicentre cohort study' published in Obstetrics, 2022 The exposure of interest was women who were exposed or unexposed to lockdown restrictions during pregnancy. The methods included the following text: "Statistical significance was tested with the t-test or chi- squared test as appropriate." TABLE 1 Maternal characteristics among control and exposed cohorts (all births) Exposed Control Maternal characteristics n 24,817) In 50017) Pvalue Maternal age, mean (SD) 31.9 14.87) 31.7 (4.96) 5.001 Weight in kg, mean (SD) 70.39 (17-13) 70.20 (17 28) -17 Height in com, mean (SD) 163.17 (7-19) 163.26 (7.05) 14 Smoking in pregnancy, n (%] 1313 5.37 2760 5.52) BM categories, n (%]