Chapter 4 120 *Footnote: Age and sex characteristics of populations excluded and included from study, by enrolment site PHSA site Hospital sites Excluded (n=194)† Included (n=161) p-value Excluded (n=1027)‡ Included (n=188) p-value Sex (n, %) Male 105 (54%) 80 (50%) 0.405 175 (17%) 113 (62%) Not assessed Female 89 (46%) 81 (50%) 113 (11%) 68 (38%) Missing 0 (0%) 0 (0%) 739 (72%) 0 (0%) Age, years (median, IQR) 35 (27-49) 38 (28-53) 0.039 64 (53-72) 57 (47-66) <0.001 N/A= Not applicable. PHSA = Public Health Service of Amsterdam. Median age compared using Mann-Whitney U-test. Proportion male sex compared using Chi-square test (not assessed for hospital site due to high proportion of missing values within excluded group. *Random selection from notification data (PHSA) and COVID-19 diagnostic data (hospital setting) (see Methods). † At the PHSA, 194/355 denotes the proportion of patients who decided not to partake in the study after they had been contacted by telephone and invited to take part in the study. The total number of notified cases who did not meet study eligibility criteria (see Methods for inclusion and exclusion criteria) was not counted. The number of patients assessed for eligibility is therefore lower at the PHSA site than the hospital sites. ‡ At the hospital sites, 1027/1208 denotes the proportion of patients who either did not meet study eligibility criteria (see Methods for inclusion and exclusion criteria) or decided not to partake in the study after they had been approached on the hospital wards and invited to take part in the study. The number of patients assessed for eligibility is therefore higher at the hospital sites than the PHSA site.
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