Longitudinal seroepidemiologic study of the 2009 pandemic influenza A (H1N1) infection among health care workers in a children's hospital

Table 1 Demographics, vaccination history, and personal protection adherence of 150 health care workers at a children's hospital during the 2009 H1N1 influenza pandemic in Taiwan

Characteristics	All (N = 150) No. (%)	High risk (N = 93) No. (%)	Low risk (N = 57) No. (%)	P value²
Age, mean ± SD [range], year	31.8 ± 6.3[22-59]	30.8 ± 5.8 [23-59]	33.5 ± 6.8 [23-51]	0.008
Male: Female	34:116	28:65	6:51	0.005
Vaccinated with
2009 seasonal influenza vaccine	77 (51.3%)	60 (64.5%)	17 (29.8%)	< 0.001
2009 H1N1 influenza vaccine	60 (40.0%)	53 (57.0%)	7 (12.3%)	< 0.001
Optimal PPE
N95 mask	5 (3.3%)	5 (5.4%)	0 (0%)	0.157
Surgical mask	133 (88.7%)	93 (100%)	40 (70.2%)	< 0.001
Hand hygiene	143 (95.3%)	93 (100%)	50 (87.7%)	< 0.001

Comparisons were made between high- and low-risk groups¹
Abbreviations: SD, standard deviation; PPE, personal protective equipment.
¹ See text for definition of high- and low-risk groups.
² P values were calculated by Chi-square test or Fisher exact test to compare the difference between high-risk and low-risk groups.

ISSN: 1471-2334