## Latest items for MAAO-DATA-1

Aug. 25, 2023, 10:36 a.m.

Countries: China

Variables: MAAO-DATA-1

"The median age at menarche among Chinese Han girls decreased from 13.37 years in 1985 to 12.00 years in 2019, and the overall decrease was more significant in rural areas (1.77 years) than in urban areas (0.99 years)."

Variables: MAAO-DATA-1

"The median age at menarche among Chinese Han girls decreased from 13.37 years in 1985 to 12.00 years in 2019, and the overall decrease was more significant in rural areas (1.77 years) than in urban areas (0.99 years)."

June 4, 2020, 8:33 p.m.

Countries: Russia

Variables: MAAO-DATA-1

"In order to study the characteristics of the physical and sexual development of girls, 865 schoolgirls aged 12 to 15 years were examined in St. Petersburg... The age interval for the onset of menarche ranged from 10 years to 14 years 9 months; the average age of menarche was 11.9 (95% confidence interval 11.2-12.4) years."

Variables: MAAO-DATA-1

"In order to study the characteristics of the physical and sexual development of girls, 865 schoolgirls aged 12 to 15 years were examined in St. Petersburg... The age interval for the onset of menarche ranged from 10 years to 14 years 9 months; the average age of menarche was 11.9 (95% confidence interval 11.2-12.4) years."

June 4, 2020, 8:16 p.m.

Countries: Afghanistan

Variables: MAAO-DATA-1

"From the six participating provinces, a total of 237 adolescent girls participated in research activities; including in-depth interviews and focus group discussion. 50.6 percent of them were from rural settings... The mean age of respondent girls was 14.7. Average reported age at menarche for these adolescent girls was 13.1."

Variables: MAAO-DATA-1

"From the six participating provinces, a total of 237 adolescent girls participated in research activities; including in-depth interviews and focus group discussion. 50.6 percent of them were from rural settings... The mean age of respondent girls was 14.7. Average reported age at menarche for these adolescent girls was 13.1."

May 31, 2020, 8:22 p.m.

Countries: Chile

Variables: MAAO-DATA-1

"Five hundred forty-nine girls from the Growth and Obesity Chilean Cohort study.... Follow-up twice a year beginning at age 6 years...The mean age at menarche was 11.9 years (SD = 1.1); only 2.8% (15 /530) of girls experienced menarche after 14 years and 1.9% before 10 years."

Variables: MAAO-DATA-1

"Five hundred forty-nine girls from the Growth and Obesity Chilean Cohort study.... Follow-up twice a year beginning at age 6 years...The mean age at menarche was 11.9 years (SD = 1.1); only 2.8% (15 /530) of girls experienced menarche after 14 years and 1.9% before 10 years."

May 31, 2020, 8:17 p.m.

Countries: Niger

Variables: MAAO-DATA-1

"The average age of the interviewed girls was 16.8 years in Niger... [and had experienced first menstruation] at the age of 14.2 on average"

Variables: MAAO-DATA-1

"The average age of the interviewed girls was 16.8 years in Niger... [and had experienced first menstruation] at the age of 14.2 on average"

May 31, 2020, 8:15 p.m.

Countries: Burkina Faso

Variables: MAAO-DATA-1

"The average age of the interviewed girls was 14.2 years in Burkina Faso...The girls in Burkina Faso had experienced their first menstruation at the age of 12.6."

Variables: MAAO-DATA-1

"The average age of the interviewed girls was 14.2 years in Burkina Faso...The girls in Burkina Faso had experienced their first menstruation at the age of 12.6."

May 31, 2020, 8:04 p.m.

Countries: Bulgaria

Variables: MAAO-DATA-1

"A longitudinal study with 93 girls from 3 schools in Sofia in the period from 1994-2000.Mean age of menarche in girls was 11.96 + 0.75 years, (x + SD), median 12.00 years. "

Variables: MAAO-DATA-1

"A longitudinal study with 93 girls from 3 schools in Sofia in the period from 1994-2000.Mean age of menarche in girls was 11.96 + 0.75 years, (x + SD), median 12.00 years. "

May 31, 2020, 7:51 p.m.

Countries: Somalia

Variables: MAAO-DATA-1

"The mean age at menarche calculated by the recollected-age method for 524 Somalian girls, all over 16 years of age, was 14.78±0·07 years. The subjects, gathered from schools and other communities in the capital and from the Catholic Missions in Benadir and Upper and Lower Giuba, originated from all the regions of the country."

Variables: MAAO-DATA-1

"The mean age at menarche calculated by the recollected-age method for 524 Somalian girls, all over 16 years of age, was 14.78±0·07 years. The subjects, gathered from schools and other communities in the capital and from the Catholic Missions in Benadir and Upper and Lower Giuba, originated from all the regions of the country."

May 31, 2020, 7:48 p.m.

Countries: Portugal

Variables: MAAO-DATA-1

"A sample of 11 274 women born between 1920 and 1992 in northern Portugal, recruited to participate in three population‐based cohorts (EPIPorto, EPITeen, and Generation XXI) was evaluated... Age at menarche decreased with birth year (−31.1 days per 5 years; β = −.017, P < .001), women born before 1930 having a significantly higher age at menarche than those who were born after 1990 (mean (SD) = 13.1 (1.83) vs 12.0 (1.25), P < .001)."

Variables: MAAO-DATA-1

"A sample of 11 274 women born between 1920 and 1992 in northern Portugal, recruited to participate in three population‐based cohorts (EPIPorto, EPITeen, and Generation XXI) was evaluated... Age at menarche decreased with birth year (−31.1 days per 5 years; β = −.017, P < .001), women born before 1930 having a significantly higher age at menarche than those who were born after 1990 (mean (SD) = 13.1 (1.83) vs 12.0 (1.25), P < .001)."

May 31, 2020, 7:38 p.m.

Countries: Taiwan

Variables: MAAO-DATA-1

"This cross-sectional investigation was performed on 214 post-adolescent girls from central Taiwan and their birth mothers and grandmothers....The mean ages at menarche were 15.16 +/- 1.75, 14.50 +/- 1.50, and 13.00 +/- 1.26 years for grandmothers, mothers, and daughters, respectively."

Variables: MAAO-DATA-1

"This cross-sectional investigation was performed on 214 post-adolescent girls from central Taiwan and their birth mothers and grandmothers....The mean ages at menarche were 15.16 +/- 1.75, 14.50 +/- 1.50, and 13.00 +/- 1.26 years for grandmothers, mothers, and daughters, respectively."

May 31, 2020, 7:35 p.m.

Countries: Serbia

Variables: MAAO-DATA-1

"The survey involved 105 elementary school students (having menstrual cycles, specifically menarche) and 536 women, their mothers.... The average age at menarche in girls was 12.17 and in their mothers at 13.08. SD was 0.95 in daughters, and 1.32 in mothers. In 33% of girls the age at menarche was the same as in their mothers, in 46% it was one year earlier or later, in 15% there was a two year difference and in the rest there was a three year difference."

Variables: MAAO-DATA-1

"The survey involved 105 elementary school students (having menstrual cycles, specifically menarche) and 536 women, their mothers.... The average age at menarche in girls was 12.17 and in their mothers at 13.08. SD was 0.95 in daughters, and 1.32 in mothers. In 33% of girls the age at menarche was the same as in their mothers, in 46% it was one year earlier or later, in 15% there was a two year difference and in the rest there was a three year difference."

May 31, 2020, 7:30 p.m.

Countries: Rwanda

Variables: MAAO-DATA-1

"The population study consisted of two groups relating to two joint surveys: (1) 466 female students (National University of Rwanda or NUR, Huye) who accepted to participate in the survey and answered the appropriate questionnaire; (2) 423 consenting schoolgirls from Nyanza boarding high schools... ages at menarche (14.4 ± 1.7 vs 14.5 ± 1.9 years; p > 0.2)(For each group respectively)"

Variables: MAAO-DATA-1

"The population study consisted of two groups relating to two joint surveys: (1) 466 female students (National University of Rwanda or NUR, Huye) who accepted to participate in the survey and answered the appropriate questionnaire; (2) 423 consenting schoolgirls from Nyanza boarding high schools... ages at menarche (14.4 ± 1.7 vs 14.5 ± 1.9 years; p > 0.2)(For each group respectively)"

May 31, 2020, 7:26 p.m.

Countries: Turkey

Variables: MAAO-DATA-1

"Mean age at menarche was estimated as 13.30 (95% CI = 13.26-13.35). It was estimated as 13.17 years (95% CI 12.95-13.38) for the youngest birth cohort (1989-1993), as opposed to 13.44 (95% CI 13.37-13.52) years for the cohort born in 1959-1968."

Variables: MAAO-DATA-1

"Mean age at menarche was estimated as 13.30 (95% CI = 13.26-13.35). It was estimated as 13.17 years (95% CI 12.95-13.38) for the youngest birth cohort (1989-1993), as opposed to 13.44 (95% CI 13.37-13.52) years for the cohort born in 1959-1968."

May 31, 2020, 7:22 p.m.

Countries: Gambia

Variables: MAAO-DATA-1

"This study presents data gained using the ‘status quo’ method and interval regression to estimate median menarcheal age of girls in a rural Gambian community. Cross-sectional studies carried out in 1989, 2000 and 2008 revealed a median menarcheal age of 16.06 (95% CI 15.67–16.45), 15.03 (95% CI 14.76–15.30) and 14.90 (95% CI 14.52–15.28), respectively."

Variables: MAAO-DATA-1

"This study presents data gained using the ‘status quo’ method and interval regression to estimate median menarcheal age of girls in a rural Gambian community. Cross-sectional studies carried out in 1989, 2000 and 2008 revealed a median menarcheal age of 16.06 (95% CI 15.67–16.45), 15.03 (95% CI 14.76–15.30) and 14.90 (95% CI 14.52–15.28), respectively."

May 31, 2020, 7:19 p.m.

Countries: Ethiopia

Variables: MAAO-DATA-1

"The probit analysis of the status quo data yielded a median (CI) age at menarche of 14.8 (13.9-15.3) years. The average age at menarche by recall method was 15.8 ± 1 years. The mean age at menarche was 0.3 years younger for urban females compared with rural ones (p < 0.001)."

Variables: MAAO-DATA-1

"The probit analysis of the status quo data yielded a median (CI) age at menarche of 14.8 (13.9-15.3) years. The average age at menarche by recall method was 15.8 ± 1 years. The mean age at menarche was 0.3 years younger for urban females compared with rural ones (p < 0.001)."

May 16, 2020, 8:44 p.m.

Countries: Nigeria

Variables: MAAO-DATA-1

"Among the girls who had started menstruation, the overall mean and median ages at onset of menstruation were 13.536 ± 1.789 and 14 years respectively. The age at onset of menstruation was 13.250 ± 1.591 years among those aged 15–19 years, compared to 14.042 ± 2.025 years among those aged 20–24 years."

Variables: MAAO-DATA-1

"Among the girls who had started menstruation, the overall mean and median ages at onset of menstruation were 13.536 ± 1.789 and 14 years respectively. The age at onset of menstruation was 13.250 ± 1.591 years among those aged 15–19 years, compared to 14.042 ± 2.025 years among those aged 20–24 years."

May 16, 2020, 8:36 p.m.

Countries: Argentina

Variables: MAAO-DATA-1

"The aim of this study was to determine the age at menarche and its association with biological and socioeconomic factors in girls from Santa Rosa (La Pampa, Argentina)... The median age at menarche - estimated by the logit method--was 12.84 years (95% CI: 12.71, 12.97)"

Variables: MAAO-DATA-1

"The aim of this study was to determine the age at menarche and its association with biological and socioeconomic factors in girls from Santa Rosa (La Pampa, Argentina)... The median age at menarche - estimated by the logit method--was 12.84 years (95% CI: 12.71, 12.97)"

May 16, 2020, 7:44 p.m.

Countries: Indonesia

Variables: MAAO-DATA-1

"The mean age of menarche was 12.96 years with mean BMI was 19.17 (50th to 75th percentile of BMI curve). The lowest mean age of menarche was found at Yogyakarta (12.45 years) and the highest was at Kupang (13.86 years). Kupang girls had their menarche at lower BMI (18.59) than other regions in Indonesia."

Variables: MAAO-DATA-1

"The mean age of menarche was 12.96 years with mean BMI was 19.17 (50th to 75th percentile of BMI curve). The lowest mean age of menarche was found at Yogyakarta (12.45 years) and the highest was at Kupang (13.86 years). Kupang girls had their menarche at lower BMI (18.59) than other regions in Indonesia."

May 16, 2020, 7:35 p.m.

Countries: Iraq

Variables: MAAO-DATA-1

"The present study is an attempt to determine the age at menarche in a sample of apparently healthy Iraqi girls, from 5th class of primary school to 3rd class of intermediate school in Al-Kharkh area of Baghdad Governorate... The study showed that mean age at menarche of the adolescent girls was 12.61+1.74 years"

Variables: MAAO-DATA-1

"The present study is an attempt to determine the age at menarche in a sample of apparently healthy Iraqi girls, from 5th class of primary school to 3rd class of intermediate school in Al-Kharkh area of Baghdad Governorate... The study showed that mean age at menarche of the adolescent girls was 12.61+1.74 years"

May 9, 2020, 1:48 p.m.

Countries: Australia

Variables: MAAO-DATA-1

"This was a prospective cohort study where girls from the West Australian Pregnancy (Raine) Cohort Study were followed prospectively from fetal life (18 wk of pregnancy) to adolescence (12–14 yr)... The median age of menarche in these 349 girls was 13.0 yr (IQ range 12.2–14.2; range 9.4–14.6)."

Variables: MAAO-DATA-1

"This was a prospective cohort study where girls from the West Australian Pregnancy (Raine) Cohort Study were followed prospectively from fetal life (18 wk of pregnancy) to adolescence (12–14 yr)... The median age of menarche in these 349 girls was 13.0 yr (IQ range 12.2–14.2; range 9.4–14.6)."

May 9, 2020, 1:39 p.m.

Countries: Italy

Variables: MAAO-DATA-1

"The median age at menarche of the subjects was 12.4 years (95% confidence interval: 12.34–12.46). The girls had their first menses approximately one-quarter of a year (median–0.13) earlier than did their mothers ( p < .0001)."

Variables: MAAO-DATA-1

"The median age at menarche of the subjects was 12.4 years (95% confidence interval: 12.34–12.46). The girls had their first menses approximately one-quarter of a year (median–0.13) earlier than did their mothers ( p < .0001)."

May 9, 2020, 1:34 p.m.

Countries: Bangladesh

Variables: MAAO-DATA-1

"The study assessed the age at menarche using recall, its seasonality, and association with marital and nutritional status (using midupper arm circumference [MUAC]) among 3,923 female adolescents aged 12–19 years in a rural area of Bangladesh. At the time of assessment, most (88%) adolescents had attained menarche at the mean (standard deviation [SD]) age of 12.8 (1.4) years. Age of onset of menarche among married adolescents (13%) occurred earlier than in those who were unmarried (12.6±1.3 years vs 12.9±1.4 years, p<0.01)."

Variables: MAAO-DATA-1

"The study assessed the age at menarche using recall, its seasonality, and association with marital and nutritional status (using midupper arm circumference [MUAC]) among 3,923 female adolescents aged 12–19 years in a rural area of Bangladesh. At the time of assessment, most (88%) adolescents had attained menarche at the mean (standard deviation [SD]) age of 12.8 (1.4) years. Age of onset of menarche among married adolescents (13%) occurred earlier than in those who were unmarried (12.6±1.3 years vs 12.9±1.4 years, p<0.01)."

May 8, 2020, 8:38 p.m.

Countries: Japan

Variables: MAAO-DATA-1

"The mean age at menarche was 13.7 ± 1.8 years for participants in the study"

Variables: MAAO-DATA-1

"The mean age at menarche was 13.7 ± 1.8 years for participants in the study"

May 8, 2020, 8:13 p.m.

Countries: India

Variables: MAAO-DATA-1

"The mean age at menarche among Indian women was 13.76 years (95 % CI: 13.75, 13.77) in 2005. It declined by three months from 13.83 years (95% CI: 13.81, 13.85) among women born prior to 1955–1964, to nearly 13.62 years (95% CI: 13.58, 13.67) among women born during late 1985–1989"

Variables: MAAO-DATA-1

"The mean age at menarche among Indian women was 13.76 years (95 % CI: 13.75, 13.77) in 2005. It declined by three months from 13.83 years (95% CI: 13.81, 13.85) among women born prior to 1955–1964, to nearly 13.62 years (95% CI: 13.58, 13.67) among women born during late 1985–1989"

May 7, 2020, 7:38 p.m.

Countries: Morocco

Variables: MAAO-DATA-1

"The data were derived from a survey conducted between 2014 and 2016 in schools of the Marrakesh region...Out of the 433 girls surveyed, 265 had attained menarche, and the mean was at 13.10 years. The median age at menarche was 13.46 years. According to the place of residence, the girls living in urban areas on average had their first menstruation earlier than girls from rural areas. The mean and median ages at menarche of urban girls were 12.96 years and 13.16 years, respectively, compared with 13.34 years and 13.94 years for their rural counterparts."

Variables: MAAO-DATA-1

"The data were derived from a survey conducted between 2014 and 2016 in schools of the Marrakesh region...Out of the 433 girls surveyed, 265 had attained menarche, and the mean was at 13.10 years. The median age at menarche was 13.46 years. According to the place of residence, the girls living in urban areas on average had their first menstruation earlier than girls from rural areas. The mean and median ages at menarche of urban girls were 12.96 years and 13.16 years, respectively, compared with 13.34 years and 13.94 years for their rural counterparts."

May 7, 2020, 7:26 p.m.

Countries: Bosnia-Herzegovina

Variables: MAAO-DATA-1

"The median age at menarche for all [Federation of Bosnia and Herzegovina] girls is 13.02 years (12.99-13.05, 95% CI). Three percent of all girls start to menstruate before 11.04 years of age (10.98-11.09, 95% CI), and 97% of all girls are menstruating by 15.37 years of age (15.29-15.44, 95% CI)."

Variables: MAAO-DATA-1

"The median age at menarche for all [Federation of Bosnia and Herzegovina] girls is 13.02 years (12.99-13.05, 95% CI). Three percent of all girls start to menstruate before 11.04 years of age (10.98-11.09, 95% CI), and 97% of all girls are menstruating by 15.37 years of age (15.29-15.44, 95% CI)."

May 4, 2020, 7:56 p.m.

Countries: South Africa

Variables: MAAO-DATA-1

"Menarcheal age was estimated for 287 (188 Black; 99 White) urban South African girls born in Soweto‐Johannesburg in 1990. The median menarcheal age for Blacks was 12.4 years (95% confidence interval (CI) 12.2, 12.6) and 12.5 years (95% CI 11.7, 13.3) for Whites. "

Variables: MAAO-DATA-1

"Menarcheal age was estimated for 287 (188 Black; 99 White) urban South African girls born in Soweto‐Johannesburg in 1990. The median menarcheal age for Blacks was 12.4 years (95% confidence interval (CI) 12.2, 12.6) and 12.5 years (95% CI 11.7, 13.3) for Whites. "

May 4, 2020, 7:50 p.m.

Countries: Malawi

Variables: MAAO-DATA-1

"A cross-sectional sexual behaviour survey was conducted on all individuals age 15–59 within a demographic surveillance site in Karonga District, Malawi. Time trends were assessed using birth cohorts...Age at menarche was similar in each birth cohort (median 15.1 years)... In the current analysis there was a strong association between age at menarche and school level reached, consistent with an effect of menstruation on schooling. But this association was much less strong after adjusting for early sexual debut, suggesting that it was the early sex that led to the lower schooling level, not primarily the menstruation itself. Conversely the association between age at menarche and early sexual debut was not changed...more

Variables: MAAO-DATA-1

"A cross-sectional sexual behaviour survey was conducted on all individuals age 15–59 within a demographic surveillance site in Karonga District, Malawi. Time trends were assessed using birth cohorts...Age at menarche was similar in each birth cohort (median 15.1 years)... In the current analysis there was a strong association between age at menarche and school level reached, consistent with an effect of menstruation on schooling. But this association was much less strong after adjusting for early sexual debut, suggesting that it was the early sex that led to the lower schooling level, not primarily the menstruation itself. Conversely the association between age at menarche and early sexual debut was not changed...more

May 4, 2020, 7:22 p.m.

Countries: Kuwait

Variables: MAAO-DATA-1

"This study aimed to estimate the age of menarche in Kuwait and investigate the association between menarcheal age and academic performance among high school girls in Kuwait. A cross-sectional study was conducted on randomly selected female high school students from private and public high schools in all governorates in Kuwait... The mean age of menarche was 12.33 [95% confidence interval (CI) 12.18-12.49] years"

Variables: MAAO-DATA-1

"This study aimed to estimate the age of menarche in Kuwait and investigate the association between menarcheal age and academic performance among high school girls in Kuwait. A cross-sectional study was conducted on randomly selected female high school students from private and public high schools in all governorates in Kuwait... The mean age of menarche was 12.33 [95% confidence interval (CI) 12.18-12.49] years"

May 4, 2020, 7:22 p.m.

Countries: Kuwait

Variables: MAAO-DATA-1

"This study aimed to estimate the age of menarche in Kuwait and investigate the association between menarcheal age and academic performance among high school girls in Kuwait. A cross-sectional study was conducted on randomly selected female high school students from private and public high schools in all governorates in Kuwait... The mean age of menarche was 12.33 [95% confidence interval (CI) 12.18-12.49] years"

Variables: MAAO-DATA-1

"This study aimed to estimate the age of menarche in Kuwait and investigate the association between menarcheal age and academic performance among high school girls in Kuwait. A cross-sectional study was conducted on randomly selected female high school students from private and public high schools in all governorates in Kuwait... The mean age of menarche was 12.33 [95% confidence interval (CI) 12.18-12.49] years"