Table 6.

Unadjusted and adjusted human brucellosis incidence rate ratios and 95 % confidence intervals ^a, 2010–2015, Abu Dhabi Emirate, United Arab by age-group, gender, nationality and, Region

	Unadjusted negative binomial regression			Adjusted negative binomial regression
	Brucellosis			Brucellosis
Predictors	IRR	95 % CI	P Value	IRR	95 % CI	P Value
Age
0–19 years	Ref			Ref
20–39 years	0 · 95	0 · 44–2 · 05	0 · 905	1 · 17	0 · 63–2 · 17	0 · 625
40–59 years	1 · 74	0 · 79–3 · 81	0 · 168	1 · 95	1 · 04–3 · 64	0 · 037
60+ years	2 · 90	1 · 17–7 · 15	0 · 021	2 · 81	1 · 31–6 · 04	0 · 008
Gender
Female	Ref			Ref
Male	1 · 84	0 · 98–3 · 43	0 · 057	2 · 13	1 · 32–3 · 45	0 · 002
Nationality
Expatriate	Ref			Ref
Emirati National	2 · 54	1 · 45–4 · 45	0 · 001	2 · 52	1 · 55–4 · 11	<0 · 001
Region
Western	Ref			Ref
Abu Dhabi	3 · 04	1 · 25–7 · 38	0 · 014	2 · 09	1 · 01–4 · 35	0 · 048
Eastern	1 · 99	0 · 81–4 · 91	0 · 133	1 · 78	0 · 87–3 · 67	0 · 116

Source: HAAD e-notification system and Statistics Center Abu Dhabi

Abbreviations: IRR incidence rate ratio, CI confidence interval

^aConfidence Intervals are calculated using negative binomial regression