Possibility of first intercourse by certain ages: The chance that a person has adept 1st sexual intercourse by various many years am determined using the Kaplana€“Meier therapy making use of SUDAAN programs

Possibility of first intercourse by certain ages: The chance that a person has adept 1st sexual intercourse by various many years am determined using the Kaplana€“Meier therapy making use of SUDAAN programs

This methods makes use of age-specific rates to calculate the number of people of a cohort will encounter an event (e.g., basic sexual intercourse) during a period. These possibilities will not represent the particular percentages of individuals who have had intercourse by each age indicated; rather, these people stand for how probable actually that someone has got sexual intercourse by a specific get older, because of the age-specific initial gender charges noticed for doing this NSFG-based cohort. Including, a probability of very first sexual intercourse of 0.78 by years 20 for male teenagers is the reason why by era 20 undoubtedly a 78% possibility that they need to have experienced sex for the first time.

Sexual experience: The recode varying HADSEX show if the respondent had vaginal sexual activity, labeled found in this document just as sexual intercourse.

Used a birth control means to begin with sexual activities: The recode changeable SEX1MTHD1 shows whether any contraceptive system was used to start with sexual intercourse, incase extremely, exactly what method(s).

Repository and methods

This report will depend on records from 924 women and 886 male young adults outdated 15a€“19 who had been questioned into the 2015a€“2017 NSFG. For data 2 and 3, analyses integrated an added 744 ladies and 640 guys outdated 20a€“24. These more situations comprise incorporated to enhance test measurement because: (a) among those elderly 15a€“19 who have perhaps not experienced these functions can do hence before age 20; and (b) those elderly 20a€“24 have finished the company’s age of puberty, and since some queries look for retrospective know-how, such as the respondents era at key activities, possible create information about if they encountered these occasions within their teen years. Certain styles tends to be offered making use of facts from three more info choice periods of NSFG (2002, 2006a€“2010, and 2011a€“2015).

The trend when you look at the number of teenagers could had sexual activities (number 1) is restricted to never-married youngsters. However, considering the rarity of wedding among teenagers in the United States during this period (1percenta€“2percent of female young adults and 0.23per centa€“0.40percent of male teens), reducing the offers displayed in data 2a€“4 to never-married teens could possibly have manufactured little affect the shows (6,7).

NSFG produces more information about sex, birth control need, and the time of childbearing among U.S. people outdated 15a€“49. All reports inside state happened to be adjusted to reveal family members public of usa at the midpoint of 2015a€“2017 interviewing (July 2016). The response fee in 2015a€“2017 for female young adults is 67.8% and male teenagers had been 65.6percent.

Data for doing this document happened to be developed by using the RESEARCH processes in SAS tool type 9.4. The probabilities of earliest sexual activity (Figure 2) comprise created with the Kaplana€“Meier technique in SUDAAN. Rates were contrasted making use of two-tailed t exams at the 5per cent levels. No modifications comprise designed for a number of compare. Your data introduced through this document tends to be bivariate sugar baby in New York organizations that could be defined by elements definitely not manageable for during the statistics or part of the state.

The writers

Gladys M. Martinez and Joyce C. Abma include with all the domestic core for medical reports, department of Vital report, Reproductive stats division.


  1. Hamilton become, Martin JA, Osterman MJK, Rossen LM. Births: Provisional info for 2018. Important report fast production; no 7. Hyattsville, MD: National Center for fitness reports. Will 2019.
  2. Kost K, Maddow-Zimet I, Arpaia A. Pregnancies, births and abortions among teenagers and ladies in the us, 2013: domestic and condition fashions by era, rush and race outside symbol . Nyc: Guttmacher Institute. 2017.
  3. U.S. section of Health and individual facilities, workplace of diseases protection and fitness advancement. Nutritional Group 2020. Washington, DC. Family designing outside famous .
  4. Sedgh grams, better LB, Bankole their, Eilers MA, Singh S. teenage pregnancy, delivery, and abortion charge across nations: grade and recent styles. J Adolesc Overall Health 56(2):223a€“30. 2015.
  5. Abma JC, Martinez GM. Sex and contraceptive incorporate among young adults in the us, 2011a€“2015. Nationwide Overall Health Data Data; no 104. Hyattsville, MD: Nationwide Facility for Fitness Studies. 2017.
  6. Chandra one, Martinez GM, Mosher WD, Abma JC, Jones J. virility, family members designing, and reproductive medical of U.S. ladies: info within the 2002 state Survey of personal gains. State Hub for Overall Health Numbers. Crucial Fitness Stat 23(25). 2005.
  7. Martinez GM, Chandra The, Abma JC, Jones J, Mosher WD. Virility, birth control, and fatherhood: records on gents and ladies from bicycle 6 (2002) associated with the National study of personal expansion. Domestic Focus for Fitness Stats. Required Overall Health Stat 23(26). 2006.

Proposed citation

Martinez GM, Abma JC. Sexual intercourse and contraceptive make use of among young adults outdated 15a€“19 in america, 2015a€“2017. NCHS Reports Concise, no 366. Hyattsville, MD: National Hub for Fitness Statistics. 2020.

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