TABLE 5. Factors Associated With the Continuation of Breastfeeding in Multiple Cox Regression Models.

Major Factors	B	SE	Hazard Ratio (95% Confidence Interval)	p Value
Iowa Infant Feeding Attitude Scale	−.06	.03	0.94 (0.88–0.99)	.03
Age	−.03	.05	0.98 (0.88–1.09)	.65
Family annual income (in New Taiwan dollars)a
Less than $400,000b			1.00 (reference)	.23
$400,000–$600,000	−.91	.75	0.40 (0.09–1.76)	.26
$600,001–$1,000,000	−.78	.69	0.46 (0.12–1.76)	.18
More than $1,000,000	−1.00	.74	0.37 (0.09–1.57)
Employment status
Unemployed	.22	.43	1.25 (0.54–2.90)	.60
Parity
First birthb			1.00 (reference)	.16
Second birth	−1.14	.63	0.32 (0.09–1.11)	.07
Third birth or more	−.84	.56	0.43 (0.14–1.29)	.13
Gender of Baby
Male	−.26	.37	0.77 (0.37–1.61)	.49
Previous breastfeeding experience
No	−0.77	0.58	0.43 (0.15–1.43)	.18
Method of birth
Vaginal birth	.24	.40	1.27 (0.58–2.77)	.55

^aIn 2010, $1 in U.S. currency equaled $32 in New Taiwan dollars.

^bReference category.