Example sentences of "median [noun sg] at first " in BNC.
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| 1 | We therefore performed the analysis on 172 patients : the median age at first intercourse was 17 ( interquartile range 16–19 ) years , and the median number of sexual partners was 4 ( interquartile range 2–10 ) partners . |
| 2 | Thus , in most WFS countries in the Western Hemisphere and East & South-East Asia & Oceania regions , among the women who were aged 25–29 when interviewed , median age at first marriage or union was about 20.2 and 18.8 , respectively , and the median age at first birth ( i.e. the age at which half of them had already had a birth ) was around 21 years ( between 19 and 24 years in individual countries ) . |
| 3 | Thus , in most WFS countries in the Western Hemisphere and East & South-East Asia & Oceania regions , among the women who were aged 25–29 when interviewed , median age at first marriage or union was about 20.2 and 18.8 , respectively , and the median age at first birth ( i.e. the age at which half of them had already had a birth ) was around 21 years ( between 19 and 24 years in individual countries ) . |
| 4 | Among the 39 developing countries that participated in the WFS , there is a strong correlation between the median age at first marriage or union and the median age at first birth among women aged 25–29 years at the time of the survey . |
| 5 | Among the 39 developing countries that participated in the WFS , there is a strong correlation between the median age at first marriage or union and the median age at first birth among women aged 25–29 years at the time of the survey . |
| 6 | Thus , in a group of 15 countries where median age at first marriage was between 15.2 and 18.3 years , the median age at first birth fell in the range of 18.6–19.9 years , irrespective of whether , within that age range women in that country married earlier or later . |
| 7 | Thus , in a group of 15 countries where median age at first marriage was between 15.2 and 18.3 years , the median age at first birth fell in the range of 18.6–19.9 years , irrespective of whether , within that age range women in that country married earlier or later . |
| 8 | On the other hand , from about age seventeen and a half , the higher the median age at first marriage , the higher the median age at first birth , too . |
| 9 | On the other hand , from about age seventeen and a half , the higher the median age at first marriage , the higher the median age at first birth , too . |
| 10 | ( For 19 countries , where median age at first marriage was 17.4 years or more , the slope of the regression line is steeper ; the regression equation is : . |
| 11 | As Fig. 2 shows , the lower the median age at first marriage in a country , the more time elapses until the first birth occurs . |
| 12 | In other words , there is a negative correlation between median age at first marriage and at first birth . |
| 13 | On average , the interval between the median age at first marriage and at first birth is two years . |
| 14 | The relationship between early marriage and later infecundity also stands if the proportion of infecund women is regressed on the median age at first marriage . |
| 15 | The correlation between median age at first marriage and infecundity at ages 20–24 years is negative and as strong as in the case of proportion married at exact age 16 years . |
| 16 | ( See also median age at first marriage ) . |
| 17 | MEDIAN AGE AT FIRST MARRIAGE ( or AT FIRST BIRTH ) — It relates to a central tendency in the age of first marriage ( or first birth ) of women ( or of a specified group of women ) . |