Asymptomatic Significant Bacteriuria in the Non-pregnant Woman: I. Description of a Population

Power and Sample Size for Testing Homogeneity of Relative Risks in Prospective Studies

“…The study indicated no association between OC use and bacteriuria for the younger group but a very strong positive association for the older group. Conflicting reports in prior studies (e.g., Kunin and McCormack, 1968;Sussman et al, 1969;Takahashi and Loveland, 1974) could be explained by the age factor. From ( l ) , the score test for detecting heterogeneity of two relative risks is highly significant ( X ; = 14.55, p = 0.0001).…”

Pyelonephritis lenta. Consideration of childhood urinary infection as the forerunner of renal insufficiency in later life.

“…Reflux was not studied in these series, but Williams et al (1968) observed this in 21% of a group of bacteriuric women, and Heidrick, Mattingly, and Amberg (1967) in 2 -8% of a group of 321 pregnant or post-partum women, one-third of whom had had pyelonephritis of pregnancy. Sussman et al (1969) consider that bacteriuria in pregnant women has usually followed overt infection in the past, and, by comparing a group of 88 bacteriuric with a similar group of non-bacteriuric pregnant women, confirmed that a past history of urinary infection is commoner among the former, and that x-ray abnormalities were present in 34% of bacteriurics compared with only 12% of controls.…”

“…Kunin (1968) estimated that 1 in 10 American schoolgirls have had either bacteriuria or overt urinary infection by the age of 18. Sussman et al (1969) found the incidence of bacteriuria to be 3-5 % in women at every age from 20 to 65. 90% of bacteriuric women had a history of urinary infection, and 34% of them had x-ray abnormalities in the urinary tract.…”

Asymptomatic bacteriuria in schoolchildren in Newcastle upon Tyne.

“…Savage et al (1973) found scarred kidneys in 13-50% of 84 5-year-old school entrants without a previous history of known urinary tract infection; Asscher et al (1973) found 200% in 5to 11-year-old girls in Oxford and Cardiff, and Kunin et al (1962) found 16% in Virginian schoolgirls. Williams et al (1968) found scarred kidneys in 17% of pregnant women with ASB and Sussman et al (1969) found that 13% of nonpregnant adult women with ASB had renal scars. Smellie et al (1964) found scarred kidneys in only 16% of children presenting at hospital with symptomatic urinary tract infection.…”