As per oracle documentation, when you perform "ANALYZE... VALIDATE STRUCTURE ONLINE", no statistics are gathered, the process only validates the integrity of the object:
When you validate the structure of an object ONLINE, Oracle does not collect any statistics, as it does when you validate the structure of the object OFFLINE
Regarding the question about where to get various index statistics from: You can get all of them (except del_lf_rows) in DBA_/ALL_USER_INDEXES. You must of course first collect those statistics either with ANALYZE command or (preferebly) by using DBMS_STATS.
Jurij Modic ASCII a stupid question, get a stupid ANSI
24 hours in a day .... 24 beer in a case .... coincidence?