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Table 3 Increase of COVID-19 cases per 100,000 inhabitants in the Netherlands

From: Why crowding matters in the time of COVID-19 pandemic? - a lesson from the carnival effect on the 2017/2018 influenza epidemic in the Netherlands

Daya Cumulative Casesb Absolute rate differencec
(95% CI)
Rate ratioc
(95% CI)
Non-carnival region Carnival region
2020/02/23d
2020/02/24d
2020/02/25d
2020/02/26
2020/02/27 0 0.02 0.02 (−0.01–0.11) 13.18 (0.13-Inf)
2020/02/28 0.01 0.02 0.01 (−0.03–0.10) 2.53 (0.05–134.09)
2020/02/29 0.02 0.04 0.02 (−0.04–0.12) 1.74 (0.17–12.81)
2020/03/01 0.03 0.06 0.03 (−0.04–0.15) 1.93 (0.31–10.18)
2020/03/02 0.03 0.06 0.03 (−0.04–0.15) 1.93 (0.31–10.18)
2020/03/03 0.09 0.25 0.16 (0.02–0.34) 2.76 (1.15–6.71)
2020/03/04 0.16 0.35 0.19 (0.02–0.40) 2.16 (1.08–4.26)
2020/03/05 0.40 0.55 0.15 (−0.08–0.42) 1.37 (0.83–2.21)
2020/03/06 0.62 0.96 0.34 (0.04–0.68) 1.55 (1.06–2.24)
2020/03/07 0.86 1.57 0.72 (0.34–1.14) 1.84 (1.36–2.48)
2020/03/08 1.07 2.51 1.44 (0.97–1.96) 2.34 (1.82–3.01)
2020/03/09 1.16 3.56 2.40 (1.85–2.99) 3.06 (2.45–3.84)
2020/03/10 1.40 4.21 2.82 (2.22–3.46) 3.02 (2.46–3.71)
2020/03/11 1.69 5.83 4.13 (3.43–4.88) 3.44 (2.87–4.12)
2020/03/12 2.11 7.03 4.93 (4.15–5.75) 3.34 (2.84–3.93)
2020/03/13 2.60 9.28 6.69 (5.80–7.62) 3.57 (3.09–4.13)
2020/03/14 3.07 11.08 8.02 (7.05–9.03) 3.61 (3.17–4.13)
2020/03/15 3.67 12.70 9.03 (7.98–10.11) 3.46 (3.06–3.91)
  1. Abbreviation: CI Confidence interval
  2. a Only the first 3 weeks after the first date of the carnival in 2020 are presented in this Table. Full presentation of all the available data can be found in Table S5
  3. b Cumulative cases of COVID-19 cases per 100,000 inhabitants
  4. c Compared with non-carnival region
  5. d Carnival period