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Probability of first sexual activity by selected centuries: The probability that a specific have adept 1st sexual activities by several years had been estimated making use of Kaplana€“Meier processes utilizing SUDAAN system

Probability of first sexual activity by selected centuries: The probability that a specific have adept 1st sexual activities by several years had been estimated making use of Kaplana€“Meier processes utilizing SUDAAN system

This methods employs age-specific numbers to estimate what amount of people of a cohort will understanding a celebration (for example, first sexual intercourse) during a period. These possibilities will not portray the exact rates of individuals that have had love by each young age proven; alternatively, these people stand for exactly how probable it is actually that someone is going to have got sexual intercourse by a specified era, considering the age-specific basic love rates observed because of this NSFG-based cohort. Including, a probability of very first love-making of 0.78 by age 20 for male youngsters means by age 20 there exists a 78% odds that they can have experienced sexual activity the first time.

Sexual experience: The recode changeable HADSEX suggest whether the responder had vaginal sexual activities, described in this particular document basically as sex.

Used a contraceptive method at the start sexual sugar baby Saskatoon intercourse: The recode adjustable SEX1MTHD1 shows whether any contraceptive way was used at the start sexual intercourse, whenever extremely, precisely what method(s).

Databases and techniques

This document lies in records from 924 female and 886 male teenagers outdated 15a€“19 who have been interviewed in 2015a€“2017 NSFG. For statistics 2 and 3, analyses provided another 744 women and 640 men elderly 20a€“24. These additional matters were consisted of to increase taste length because: (a) some of those outdated 15a€“19 with definitely not skilled these occasions can perform therefore before period 20; and (b) those elderly 20a€“24 have completed their own teenage years, and also, since some questions request retrospective information, for example respondents era at critical happenings, could render home elevators whether or not they encountered these functions as part of the age of puberty. Certain styles include provided utilizing reports from three other records choice periods of NSFG (2002, 2006a€“2010, and 2011a€“2015).

The excitement in portion of youngsters with ever had sexual activity (number 1) is limited to never-married teenagers. However, given the rarity of wedding among teens in the usa during this time period (1percenta€“2percent of feminine youngsters and 0.23percenta€“0.40percent of male teenagers), limiting the estimates revealed in Figures 2a€“4 to never-married young adults will have produced small influence on the rates (6,7).

NSFG produces detailed information about intercourse, birth control incorporate, plus the moment of childbearing among U.S. females outdated 15a€“49. All offers contained in this report happened to be weighted to mirror the household population regarding the US with the midpoint of 2015a€“2017 interviewing (July 2016). The response rate in 2015a€“2017 for feminine teenagers got 67.8% for male young adults would be 65.6percent.

Numbers correctly review were released with the SURVEY techniques in SAS program variation 9.4. The possibilities of initial sexual activity (body 2) happened to be produced using the Kaplana€“Meier technique in SUDAAN. Proportions had been likened using two-tailed t screening at 5% levels. No variations comprise made for several contrasting. Your data given with this report are bivariate interaction which may be mentioned by additional factors not manageable for in the numbers or included in the report.

Concerning the writers

Gladys M. Martinez and Joyce C. Abma are actually by using the nationwide middle for wellness reports, unit of Critical research, Reproductive reports department.


  1. Hamilton generally be, Martin JA, Osterman MJK, Rossen LM. Births: Provisional reports for 2018. Vital reports fast production; no 7. Hyattsville, MD: nationwide Center for overall health stats. Will 2019.
  2. Kost K, Maddow-Zimet we, Arpaia A. Pregnancies, births and abortions among teens and women in the us, 2013: nationwide and county fashions by get older, group and race exterior star . New York: Guttmacher Institute. 2017.
  3. U.S. division of health insurance and individuals Services, Office of problem Anticipation and fitness promo. Healthful Folks 2020. Washington, DC. Kids organizing exterior star .
  4. Sedgh grams, better LB, Bankole one, Eilers MA, Singh S. teen pregnancy, start, and abortion prices across region: rates and current styles. J Adolesc Wellness 56(2):223a€“30. 2015.
  5. Abma JC, Martinez GM. Sexual practice and contraceptive make use of among teens in the usa, 2011a€“2015. State Wellness Stats Data; no 104. Hyattsville, MD: Nationwide Center for Overall Health Numbers. 2017.
  6. Chandra their, Martinez GM, Mosher WD, Abma JC, Jones J. Fertility, children coming up with, and reproductive overall health of U.S. people: Data within the 2002 nationwide study of personal development. Domestic Hub for Overall Health Numbers. Important Health Stat 23(25). 2005.
  7. Martinez GM, Chandra One, Abma JC, Jones J, Mosher WD. Virility, contraception, and fatherhood: facts on both males and females from circuit 6 (2002) associated with National Survey of relatives advancement. National Core for Medical Data. Essential Medical Stat 23(26). 2006.

Proposed citation

Martinez GM, Abma JC. Sexual intercourse and contraceptive use among teens outdated 15a€“19 in the United States, 2015a€“2017. NCHS Facts Quick, no 366. Hyattsville, MD: Domestic Center for Health Report. 2020.

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