Table Info

Table 2.

Number of hips with type distribution according to Graf, examined during 2019 and 2020

Hip type	2019			2020
Hip type	N	%	Average age (days)	N	%	Average age (days)
Ia, b	2,488	88.83	62.2	1,886	86.28	67.2
IIa	258	9.2	36.5	239	10.94	40.3
IIb	14	0.5	140.2	18	0.82	127.6
IIc	13	0.45	53.3	16	0.73	41.3
D	13	0.45	49.5	14	0.64	49.7
III	13	0.46	38.2	11	0.5	28.2
IV	3	0.11	47.6	2	0.09	11
Total	2,802	100	61.0	2,166	100	52.2

Average age at first US examination and at diagnosis. In 2020 lockdown for COVID pandemic and restrictions caused a decrease of outpatients number (n). COVID: coronavirus disease

Declarations

Author contributions

MDP: Conceptualization, Investigation, Writing—original draft, Writing—review & editing, Supervision. DF, LM, and NG: Writing—original draft, Writing—review & editing. All authors read and approved the submitted version.

Conflicts of interest

The authors declare that they have no conflicts of interest.

Ethical approval

The study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Research Institute of San Raffaele Hospital, Milan. San Raffaele Hospital is a Scientific Institute and the Center of “Vita-Salute San Raffaele University”.

Consent to participate

Informed consent to participate in the study was obtained from all participants.

Consent to publication

Not applicable.

Availability of data and materials

Not applicable.

Funding

Not applicable.

Copyright

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