Timing of Sterilization

 

Percent distribution of women sterilized by specific age groups

 

Definition

 

Percent distribution of sterilized women who had contraceptive sterilization in the specified age groups.

 

Coverage:

Population base: All women who have had a contraceptive sterilization (IR file)

Time period: Current status at the time of the survey

 

Numerator: Number of women whose contraceptive sterilization occurred in the time they were in the specified age groups (v320 = <25, 25-29, 30-34, 35-39, 40-44, 45-49)

 

Denominator: Total number of women who have had contraceptive sterilization (v312 = 6)

 

Variables: IR file.

v312

Current contraceptive method

v320

Age at sterilization

v005

Woman’s individual sample weight

 

Calculation

 

Numerator divided by the denominator, multiplied by 100.

 

Handling of Missing Values

 

Women with missing values for age at sterilization are imputed in the data file.

 

Notes and Considerations

 

Percent distribution adds up to 100 percent.

 

Resources

 

DHS-8 Tabulation plan: Table 7.5

 

API Indicator IDs:

FP_ASTR_W_A20, FP_ASTR_W_A25, FP_ASTR_W_A30, FP_ASTR_W_A35, FP_ASTR_W_A40, FP_ASTR_W_A45

(API link, STATcompiler link)

Median age at sterilization

 

Definition

 

Median age in years when women had contraceptive sterilization operation.

 

Coverage:

Population base: All women who have had a contraceptive sterilization (v312 = 6) at less than 40 years of age (v320 < 5) (IR file)

Time period: Current status at the time of the survey

 

Median: Median for completed time periods

 

Variables: IR file.

v011

Date of birth

v312

Current contraceptive method

v317

Date of start of use of method

v320

Age at sterilization

v005

Woman’s individual sample weight

 

Calculation

 

Age at sterilization is the difference between date of sterilization operation and birth date of woman, truncated to single years of age ( (v317 - v011) / 12 ).

 

Medians are calculated from cumulated single year of age percent distributions of age at sterilization. Median is linearly interpolated between the age values by which 50 percent or more of the women had been sterilized truncate.

 

Since the difference between the date of sterilization and the respondent’s birth date is truncated to years, the difference is taken as including up to next completed year of age (the cumulated percentage for women with a difference of 29 years actually includes all women below 30 years of age at sterilization). Therefore, an adjustment is made to the interpolated median by increasing the interpolated value by one year. See Median Calculations in Chapter 1.

 

Handling of Missing Values

 

Women with missing values for age at sterilization are imputed in the data file See Date Variables in Chapter 1.

 

Notes and Considerations

 

Women who were sterilized at age 40 years or over are excluded from the calculation of the median to minimize problems of censoring.

 

Since the median is based only on women who have been sterilized by the time of the survey, the median age is not calculated for periods of time of sterilization 10 years and more before the survey because of censoring (the oldest possible age in the data set would be 39 years at ten years prior and less for earlier time periods).

 

Resources

 

DHS-8 Tabulation plan: Table 7.5

 

API Indicator IDs:

FP_ASTR_W_MED

(API link, STATcompiler link)