Precocious Puberty Diagnoses Spike, COVID-19 Pandemic, and Body Mass Index: Findings From a 4-year Study

Context Since the COVID-19 outbreak, the number of girls with suspected precocious puberty has increased. Objective To compare the incidence of idiopathic central precocious puberty (ICPP) during COVID-19 with that of the previous 4 years. Methods Anthropometric, biochemical, and radiological parameters were collected between January 2016 and June 2021 from 133 girls who met the Rapidly Progressive ICPP criteria (RP-ICPP). Results We found a higher incidence of RP-ICPP between March 2020 and June 2021 (group 2) compared with January 2016 through March 2020 (group 1) (53.5% vs 41.1%); 2021 showed the highest annual incidence (P < .05). Group 1 and group 2 differed in age at diagnosis (7.96 & PLUSMN; 0.71 vs 7.61 & PLUSMN; 0.94; P < .05), mean Tanner stage (2.86 & PLUSMN; 0.51 vs 2.64 & PLUSMN; 0; P < .05), and in the time between the appearance of thelarche and diagnosis (0.93 & PLUSMN; 0.75 vs 0.71 & PLUSMN; 0.62 years, P < .05). There was an increase in the number of girls aged 8 years was found in group 1 (42 in group 1 vs 20 in group 2, P < 0.05). Overall body mass index SD score showed higher values in group 2 (1.01 & PLUSMN; 1.23 vs 0.69 & PLUSMN; 1.15; P = .18), which spent an average of 1.94 & PLUSMN; 1.81 hours per day using electronic devices; 88.5% of this group stopped any physical activity. Conclusions A spike in new diagnoses of idiopathic (1.79-fold higher) and RP-CPP coincided with the COVID-19 pandemic. The incidence of RP-ICPP was 1.3-fold higher during COVID-19 with a trend toward an increase in body mass index SD score. The expanding use of digital devices and the reduction of daily physical activity represent possible risk factors.