The phrase "as we discussed earlier" is correct and usable in written English. It is used when you are referring to something that was talked about previously in the conversation or in writing. For example, "We determined that the best approach is to increase the marketing budget. As we discussed earlier, this will allow us to reach more potential customers."
4K video, as we discussed earlier, is a given.
As we discussed earlier, idle time is anathema to managers.
As we discussed earlier in the context of Howard, this is because we are not politicians.
As we discussed earlier, negotiating a commitment should instead be an active, collaborative process.
As we discussed earlier, the Jets roster was thin even before their best players got hurt.
But as we discussed earlier, the vast majority of consumer transactions occur in other channels, such as retail stores.
As we discuss earlier, the measured δNRBC may be an overestimate, and thus the derived values of ΔNdiet-keratin and ΔNdiet-collagen may also be overestimated.
Not to rub it in, but La libertadores is definitely NOT the Brazil show as we discussed earlier this year.
The ads won't immediately appear in the mobile news feed, though Facebook is considering the idea as we discussed earlier this month.
As we discussed earlier this week, despite having always held on to a clunky amount of debt, SoftBank has managed to deliver consistent growth by making sure its revenue and operating growth outpaced the upticks in its debt and interest expense.
And, as the study we discussed earlier showed, they often don't have to leave.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK