Absences from work among healthcare workers: are they related to influenza shot adherence?

Table 3 Comparison of the absence rate between vaccinated and not vaccinated HCWs in the considered period

Year	Period	Non-vaccinated		Vaccinated		Δ Absence rate %	Confidence intervals^a	p-value^†
Year	Period	Absence person-days/Total person-days	Rate%	Absence person-days/Total person-days	Rate%	Δ Absence rate %	Confidence intervals^a	p-value^†
2017	dec 11 – dec 24	978/52,477	1.86	132/8862	1.49	+ 0.37	−0.06 – 0.74	0.015
2017–2018	dec 25 – jan 07	899/52,308	1.72	115/8842	1.30	+ 0.42	0.0001–0.76	0.004
2018	jan 08 – jan 21	1644/52,139	3.15	172/8812	1.95	+ 1.20	0.70–1.64	< 0.001
	jan 22 – feb 04	1855/52,040	3.56	180/8784	2.05	+ 1.52	1.00–1.97	< 0.001
	feb 05 – feb 18	1689/51,928	3.25	143/8764	1.63	+ 1.62	1.15–2.03	< 0.001
	feb 19 – mar 04	1617/51,811	3.12	226/8756	2.58	+ 0.54	−0.02 – 1.03	0.007
	mar 05 – mar 18	1484/51,687	2.87	234/8736	2.68	+ 0.19	−0.37 – 0.69	0.317
	mar 19 – apr 01	1265/51,619	2.45	213/8735	2.44	+ 0.01	−0.53 – 0.48	0.944
	apr 02 – apr 15	956/51,510	1.86	154/8722	1.77	+ 0.09	−0.38 – 0.49	0.562
	apr 16 – apr 29	817/51,437	1.59	148/8722	1.70	−0.11	−0.57 – 0.27	0.456
	apr 30 – may 13	876/51,269	1.71	139/8683	1.60	+ 0.11	−0.34 – 0.48	0.471
Overall		14,080/570,225	2.47	1856/96,418	1.92	+ 0.54	0.45–0.64	< 0.001

^a The 99.5% C.I. was adopted when comparing absence rates along the 14 days-long periods to comply with the Bonferroni correction. The 95% C.I. was adopted when comparing absence rates of the overall period
† The differences in absence rates are considered statistically significant when p < 0.005 according to the Bonferroni correction, except in the overall period comparison

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