. Author manuscript; available in PMC: 2016 Jun 1.

Published in final edited form as: Obstet Gynecol. 2015 Jun;125(6):1471–1477. doi: 10.1097/AOG.0000000000000841

Table 2. Frequency of short interpregnancy interval pregnancies that were intended, mistimed and unwanted, by the period after delivery in which the pregnancy occurred ^*.

	0-2 months	3-5 months	6-11 months	12-18 months

	n (%, 95% CI)	n (%, 95% CI)	n (%, 95% CI)	n (%, 95% CI)
Intended	10 (15.6, 5.9-35.3)	12 (11.5, 5.3-23.3)	45 (30.0, 21.2,41.3)	81 (67.3, 56.2-76.8)
Unintended	51 (84.4, 64.7-94.1)^†	54 (88.5, 76.7-94.7)^†	114 (70.0, 58.7-78.8)^†	67 (32.7, 23.2-43.8)
Mistimed	29 (54.4, 34.2-73.2)	29 (57.5, 41.3-72.3)	87 (56.4, 46.3-66.1)	39 (19.3, 11.9-29.7)
Unwanted	22 (30.0, 15.3-50.5)	25 (31.0, 18.2-47.5)	27 (13.2, 7.6-22.0)	28 (13.4, 8.0-21.5)

These results are from our own calculations using the NSFG 2006–2010. See http://www.cdc.gov/nchs/nsfg/nsfg_2006_2010_puf.htm for more information.

CI: confidence interval

Short interpregnancy interval pregnancies were conceived ≤18 months after a live singleton birth that occurred within 3 years of the survey date (n=434). Percentages are weighted to reflect the sampling design of the NSFG.

^†

p <0.001 compared to unintended pregnancy reported at 12-18 months after delivery. The p-value is based on negative binomial regression.

Table 2. Frequency of short interpregnancy interval pregnancies that were intended, mistimed and unwanted, by the period after delivery in which the pregnancy occurred *.

Table 2. Frequency of short interpregnancy interval pregnancies that were intended, mistimed and unwanted, by the period after delivery in which the pregnancy occurred ^*.