Table 1.

Timeline and reported mean number of referrals over different time periods that represent the Spring, Summer and Winter schools holidays in 2017–2019 and the period of the first national lockdown due to COVID-19 in 2020. These times are labelled in Fig. 1

Scenario (duration)	Start date	End date	Referral rate: mean [bias-corrected bootstrapped CI]
			Over period before school holidays or lockdown	During period of school holidays or lockdown	Over period post school holidays or lockdown
Spring 2017 (12 days)	10.04.17	21.04.17	13 [3.48,22.52]	12.35 [11.52,13.22]	12.11 [11.14,13.08]
Summer 2017 (37 days)	26.07.17	01.09.17	11.23 [10.83,11.62]	9.7 [9.26,10.13]	11.4 [10.93,11.87]
Winter 2017 (17 days)	21.12.17	07.01.17	9.188 [9.637,9.743]	7.7 [6.723,8.676]	13.02 [11.926,14.078]
Spring 2018 (19 days)	29.03.18	16.04.18	11.58 [10.56,12.61]	9.33 [8,78,9.89]	10.5 [9.89,11.11]
Summer 2018 (48 days)	20.07.18	05.09.18	12.63 [11.92,13.35]	10.43 [0.46,11.82]	15.44 [14.75,16.14]
Winter 2018 (15 days)	19.12.18	03.01.19	14.62 [13.29,15.94]	12.3 [10.29,14.31]	12.25 [11.57,12.92]
Spring 2019 (15 days)	13.04.19	28.04.19	16.89 [15.54, 18.25]	14.14 [13.18 15.11]	13.1 [12.22,13.78]
Summer 2019 (48 days)	20.07.19	06.09.19	13.27 [12.67,13.87]	12.06 [11.45,12.67]	15.54 [14.62,16.47]
Winter 2019 (17 days)	20.12.19	06.01.20	16.36 [15.12,17.60]	9.27 [7.52,11.02]	18.05 [17.01,19.09]
March–June 2020 (1st national lockdown) (68 days)	23.03.20	01.06.20	16.98 [16.18,17.78]	11.25 [10.33,15.14]	14.23 [13.34,15.14]
March–June 2019 (analogous period to 1st lockdown) (68 days)	23.03.19	01.06.19	14.86 [14.24,15.48]	13.81 [13.18,14.44]	13.21 [12.79,13.62]
Summer 2020 (42 days)	20.07.20	01.09.20	15.54 [14.76,16.32]	10.28 [9.68,10.89]	11.18 [10.71,11.65]