Possibility of very first sexual activity by certain many years: The probability that a specific provides adept initial sexual activities by several ages had been calculated with the Kaplana€“Meier process utilizing SUDAAN software

Possibility of very first sexual activity by certain many years: The probability that a specific provides adept initial sexual activities by several ages had been calculated with the Kaplana€“Meier process utilizing SUDAAN software

This method makes use of age-specific charge to determine what amount of individuals of a cohort will understanding an event (for example, basic intercourse) during an interval. These probabilities try not to express the rates of people who may have had sex by each age shown; instead, these people symbolize how most likely it is actually that an individual might have had gender by a specified generation, due to the age-specific fundamental sexual intercourse numbers followed correctly NSFG-based cohort. For example, a probability of very first sexual intercourse of 0.78 by period 20 for male teenagers ensures that by get older 20 there is certainly a 78per cent probability that they’re going to have acquired intercourse the first time.

Sexual performance: The recode varying HADSEX indicates if the respondent had vaginal sexual intercourse, labeled through this document just as intercourse.

Used a contraceptive method at the beginning sex: The recode changeable SEX1MTHD1 indicates whether any birth control way applied initially sexual intercourse, and when extremely, exactly what method(s).

Databases and means

This document is dependant on info from 924 feminine and 886 male teenagers elderly 15a€“19 who have been surveyed inside the 2015a€“2017 NSFG. For data 2 and 3, analyses integrated a supplementary 744 women and 640 men aged 20a€“24. These extra instances happened to be bundled to improve test sizing because: (a) some of these aged 15a€“19 could maybe not skilled these competition can do thus before generation 20; and (b) those elderly 20a€“24 have finished her teen years, and also, since some problems look for retrospective know-how, including the respondents era at critical parties, capable incorporate details on whether or not they encountered these happenings as part of the age of puberty. Selected trends are offered making use of facts from three additional data compilation periods of NSFG (2002, 2006a€“2010, and 2011a€“2015).

The trend inside the percentage of teenagers who may have ever endured intercourse (Figure 1) is restricted to never-married teens. But because of the rareness of marriage among youngsters in america during this time (1%a€“2% of female teens and 0.23percenta€“0.40% of male young adults), reducing the reports revealed in Figures 2a€“4 to never-married teens might have manufactured tiny impact on the shows (6,7).

NSFG produces detailed information about sexual intercourse, birth control make use of, and time of childbearing among U.S. female outdated 15a€“49. All rates with this report were weighted to reveal the household inhabitants with the U . S . with the midpoint of 2015a€“2017 interviewing (July 2016). The response price in 2015a€“2017 for feminine young adults ended up being 67.8per cent as well as male youngsters am 65.6%.

Statistics because of it state happened to be generated utilizing the SURVEY techniques in SAS application model 9.4. The possibilities of fundamental sex (Figure 2) happened to be developed using the Kaplana€“Meier therapy in SUDAAN. Percentages were when compared making use of two-tailed t tests during the 5% stage. No modifications comprise intended for numerous evaluations. The info offered with this review tends to be bivariate interactions that could be clarified by other elements definitely not influenced for during the rates or part of the report.

Towards authors

Gladys M. Martinez and Joyce C. Abma tend to be with all the state facility for Health data, section of Beneficial data, Reproductive Statistics side.


  1. Hamilton get, Martin JA, Osterman MJK, Rossen LM. Births: Provisional information for 2018. Important stats Rapid launch; no 7. Hyattsville, MD: state Center for medical studies. May 2019.
  2. Kost K, Maddow-Zimet we, Arpaia A. Pregnancies, births and abortions among teenagers and women in the usa, 2013: nationwide and state styles by years, wash and ethnicity external famous . New York: Guttmacher Institute. 2017.
  3. U.S. office of Health and person treatments, company of illness Prohibition and medical Promotion. Nutritious Folks 2020. Washington, DC. Household designing outside symbol .
  4. Sedgh G, Finer LB, Bankole the, Eilers MA, Singh S. Adolescent pregnancy, beginning, and termination rate across countries: grade and latest styles. J Adolesc Health 56(2):223a€“30. 2015.
  5. Abma JC, Martinez GM. Intercourse and contraceptive make use of among youngsters in the usa, 2011a€“2015. State Overall Health Research Report; no 104. Hyattsville, MD: State Middle for Overall Health Data. 2017.
  6. Chandra their, Martinez GM, Mosher WD, Abma JC, Jones J. Fertility, kids designing, and reproductive medical of U.S. lady: info from 2002 state analyze of group increases. National Hub for Wellness Studies. Required Medical Stat 23(25). 2005.
  7. Martinez GM, Chandra The, Abma JC , Jones J, Mosher WD. Fertility, birth control, and fatherhood: Data on both males and females from routine 6 (2002) from the domestic analyze of relatives improvement. Domestic Center for Fitness Stats. Crucial Fitness Stat 23(26). 2006.

Suggested citation

Martinez GM, Abma JC. Sexual intercourse and contraceptive utilize among young adults elderly 15a€“19 in the United States, 2015a€“2017. NCHS Facts Concise, no 366. Hyattsville, MD: State Core for Overall Health Stats. 2020.

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