Codes

This is a 11-digit numeric variable.

Description

DIABWT is an IPUMS NHIS-constructed variable that harmonizes chronic diabetes prevalence factors for the person-level variable DIABETICYRC for the years 1978-1981.

For 1978-1981, the survey question associated with DIABETICYRC was asked of persons living in 1/3 of households. This is a contrast with most of the chronic condition variables from that period, which were asked of persons living in 1/6 of households. (The other exception to this rule, apart from DIABETICYRC, is PARALANYNOWC.)

To account for this larger universe, a special weight must be used when analyzing DIABETICYRC for 1978-1981. For persons who received Condition List 1 or Condition List 3 (CONDLIST), DIABWT is calculated in three steps:

• First, the variable CCFACT is divided by a multiple of 10 to insert a decimal point. Because the width of CCFACT changes across years, the divisor also changes. For 1978, CCFACT is divided by 1,000,000. For 1979-1981, CCFACT is divided by 100,000,000.

• Second, the resulting quotient is multiplied by PERWEIGHT.

• Third, the resulting product is divided by 2.

Persons who did not receive Condition List 1 or Condition List 3 in 1978-1981 are considered "not in universe" (NIU) for DIABETICYRC and are given a weight of 0 in DIABWT.

Users should note that DIABETICYRC must be weighted with different weight variables in 1973 and 1975 (PERWEIGHT) and 1982-1996 (CONDWT4).

Comparability

There are no comparability issues with DIABWT.

Universe

Availability

• 1978-1981

Weights

• No weights are available for this variable. Please refer to DIABWT for more information.