Dynamics of IUD use in Vietnam: implications for family planning services at primary health care level

Figures & data

Table 1 Sociodemographic characteristics of 1316 women who had intrauterine devices inserted between 2006 and 2009

Characteristic N (%)	Province
Thai Nguyen	499 (37.9)
Khanh Hoa	376 (28.6)
Vinh Long	441 (33.5)
Age group
≤25 years	164 (12.5)
26–30 years	310 (23.5)
31–35 years	335 (25.5)
36–40 years	263 (29.0)
>40 years	244 (18.5)
Education
No education	26 (2.0)
Primary education	568 (43.3)
Secondary education	534 (40.7)
High school or university education	184 (14.0)
Occupation
Farmer	494 (37.7)
Housewife	377 (28.8)
Worker/freelance/handcraft	183 (14.0)
Government/business/other	257 (19.6)
Marital status
Married	1,298 (98.7)
Not married (divorced/separated/single)	17 (1.3)
Number of children
No children	101 (7.7)
1	305 (23.2)
2	656 (49.9)
3–9	254 (19.3)
Number of sons
No sons	244 (19.2)
1	707 (55.7)
2–7	276 (25.1)

Figure 1 IUD discontinuation rates at 12, 24, and 36 months in all three provinces.

Abbreviation: IUD, intrauterine device.

Table 2 Unadjusted and adjusted hazard ratios of intrauterine device discontinuation at 36 months, by sociodemographic and reproductive characteristics

Characteristics	Discontinuation at 36 months
	Unadjusted HR (95% CI)	P-value	Adjusted HRa (95% CI)	P-value
Province
Thai Nguyen	1.0		1.0
Khanh Hoa	0.81 (0.64–1.04)	0.104	1.06 (0.73–1.53)	0.753
Vinh Long	0.67 (0.52–0.86)b	0.002	0.81 (0.55–1.21)	0.308
Age group
≤25 years	1.0		1.0
26–30 years	0.94 (0.64–1.37)	0.734	1.00 (0.67–1.49)	0.992
31–35 years	0.87 (0.60–1.27)	0.482	1.06 (0.71–1.59)	0.764
36–40 years	1.15 (0.79–1.68)	0.477	1.48 (0.97–2.27)	0.067
>40 years	1.40 (0.97–2.02)	0.075	1.99 (1.29–3.07)b	0.002
Education level
No education/primary	1.0		1.0
Secondary	1.07 (0.86–1.34)	0.534	1.07 (0.84–1.34)	0.607
High school or university	0.91 (0.65–1.25)	0.549	0.89 (0.62–1.29)	0.542
Occupation
Farmer	1.0		1.0
Housewife	0.62 (0.48–0.81)b	<0.001	0.60 (0.41–0.88)c	0.010
Worker/freelance/handcraft	0.99 (0.74–1.33)	0.966	0.89 (0.61–1.31)	0.564
Government/business/other	0.63 (0.46–0.86)b	0.003	0.56 (0.37–0.86)b	0.007
Marital status
Married	1.0		1.0
Not married	0.78 (0.35–1.76)	0.553	0.82 (0.36–1.87)	0.642
Number of children
No children	1.0		1.0
1	0.76 (0.51–1.13)	0.173	1.03 (0.59–1.79)	0.917
2	0.76 (0.53–1.09)	0.140	0.87 (0.52–1.43)	0.572
3–9	0.85 (0.58–1.27)	0.438	0.72 (0.42–1.24)	0.242
Number of sons
No sons	1.0		1.0
1	0.98 (0.74–1.30)	0.885	0.91 (0.67–1.23)	0.547
2–3	1.09 (0.78–1.51)	0.618	0.99 (0.68–1.44)	0.963
4–7	1.55 (0.91–2.64)	0.109	1.28 (0.69–2.35)	0.434

a Notes: Adjusted for all other sociodemographic and reproductive characteristics in table;

b P < 0.01;

c P < 0.05.

Abbreviations: HR, hazard ratio; CI, confidence interval.