See what questions
a doctor would ask.
85 per 1000 - NHIS95 (deformity or orthopedic impairment of back) ... see also overview of Back Impairment.
approx 1 in 11 or 8.50% or 23.1 million people in USA [Source statistic for calcuation: "85 per 1000 - NHIS95 (deformity or orthopedic impairment of back)" -- see also general information about data sources]
The term 'prevalence' of Back Impairment usually refers to the estimated population
of people who are managing Back Impairment at any given time.
The term 'incidence' of Back Impairment refers to the annual diagnosis rate,
or the number of new cases of Back Impairment diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.
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