Table 4. Factors associated with prolonged delay in time from the first PHV to DHV.

	Univariate		Multivariable
	OR(95% CI)	p	OR(95% CI)	p
Gender
Female	Reference
Male	0.65(0.23–1.87)	0.42
Place of residence
Beijing, Tianjin and surrounding Hebei Province	Reference		Reference
Other provinces across China	2.33(0.87–6.20)	0.09	1.83(0.59–5.71)	0.30
Occupation
Professional, managerial, or administrative work	Reference
Others	1.79(0.65–4.91)	0.26
Time period
2009–2012	Reference		Reference
2003–2008	2.71(0.96–7.64)	0.06	5.36(1.45–19.85)	0.01
1997–2002	5.09(1.12–23.14)	0.04	6.35(1.15–34.90)	0.03
CD4+T cell count
> 50 cells/μL	Reference		Reference
≤ 50 cells/μL	2.31(0.85–6.30)	0.10	2.55(0.81–8.03)	0.11
Number of symptoms/events in the history of present illness
≤ 2 (the observed median)	Reference		Reference
> 2	3.91(1.41–10.88)	0.01	7.16(2.00–25.60)	0.002
Number of findings in the physical examination
≤ 1 (the observed median)	Reference
> 1	0.63(0.24–1.62)	0.34
Presence of an AIDS-defining condition
No	Reference
Yes	0.89(0.35–2.27)	0.81

OR, odds ratio; CI, confidence interval; AIDS, acquired immune deficiency syndrome.