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Table 1 Demographics of subjects with T1DM

From: Menarche delay and menstrual irregularities persist in adolescents with type 1 diabetes

  Participants diagnosed with T1DM before menarche (n = 185) Participants with T1DM diagnosed after menarche (n = 43)
Age at visit (years) 15.8 ± 0.2 16.5 ± 0.3
Duration (years) 7.7 ± 0.4** 2.5 ± 0.312.17 ± 0.19
Age at Menarche (years) 12.81 ± 0.09*  
A1c (%) 9.4 ± 0.14 8.8 ± 0.32
Insulin dose (units/kg body weight/day) 1.02 ± 0.02** 0.0.76 ± 0.05
BMI (kg/m2) 23.8 ± 0.4 23.9 ± 1.0
BMI z score 0.74 ± 0.05 0.56 ± 0.14
Overweight (≥ 85th percentile for age) (%) 32 35
Total physical activity   
Number of days of physical activity over last 7 days that the subject was physically active for at least 60 minutes per day 2.6 ± 0.4 2.6 ± 0.2
In a typical week the number of days that they are physically active for at least 60 minutes per day 3.0 ± 0.3 3.2 ± 0.2
Race/Ethnicity (%)   
White 82 79
Hispanic 8 5
Other 0 6
Breast tanner staging (%)   
3 2 3
4 12 28
5 86 69
Pubic tanner staging   
3 5 4
4 9 24
5 86 72
Irregular menstrual periods (%) 34 36
  1. Data are presented as mean ± SE or as % (n)
  2. * p < 0.05, ** p < 0.001