Pregnancy Risk Assessment Monitoring System (PRAMS)

PRAMS is “an ongoing, site-specific, and population-based surveillance system. PRAMS is designed to identify groups of women and infants at high risk for health problems, to monitor changes in health status, and to measure progress towards goals in improving the health of mothers and infants.”

For this example report we will be looking at these variables from the PRAMS 8 dataset:

Specifically, we will try to replicate the statistics for the Selected 2016-2022 Maternal and Child Health (MCH) Indicators for GA from any of the years from 2017-2021 which had metrics reported for GA.

MCH Indicators for GA between 2017-2021 for “Ever Breastfed”.

Here are the Maternal and Child Health (MCH) Indicators for GA between 2017-2021 for “Ever Breastfed”.

Ever Breastfed
Year Unweighted Total Sample Unweighted Frequency Weighted % Lower 95% Confidence Interval Upper 95% Confidence Interval
2017 919 749 85.2 81.6 88.2
2018 735 605 83.0 79.2 86.3
2019 766 615 79.8 75.8 83.2
2020 677 563 81.2 77.1 84.7
2021 757 590 79.8 75.9 83.3

Estimates for “Ever Breastfed” in GA in 2020.

Here are the estimates computed using the survey package and the gtsummary package to make a nicely formatted table.

Characteristic Weighted total (N) Weighted Count1 95%CI
BF5EVER.f 115,953 94,126 (81%) 77.1-84.7
    Unknown
1,987
1 n (%)

MCH Indicators for GA between 2017-2021 for “Multivitamin use 4+ times a week during the month before pregnancy”.

Here are the Maternal and Child Health (MCH) Indicators for GA between 2017-2021 for “Multivitamin use 4+ times a week during the month before pregnancy”.

Multivitamin use 4+ times a week during the month before pregnancy
Year Unweighted Total Sample Unweighted Frequency Weighted % Lower 95% Confidence Interval Upper 95% Confidence Interval
2017 953 298 31.1 26.1 34.5
2018 766 280 35.9 31.6 40.4
2019 783 278 38.3 34.0 42.7
2020 690 247 35.9 31.5 40.7
2021 781 328 41.1 36.7 45.6

Estimates for “Multivitamin use 4+ times a week during the month before pregnancy” in GA in 2020.

Here are the estimates computed using the survey package and the gtsummary package to make a nicely formatted table.

Characteristic Weighted total (N) Weighted Count1 95%CI
VITAMIN_4plus.f 117,577
31.5-40.7
    3x/week or less
75,314 (64%)
    4x/week or more
42,264 (36%)
    Unknown
363
1 n (%)

Logistic Regression - Breastfed Ever by Maternal Age and Multivitamin Use

Look at predicting “Ever Breastfed” by multivitamin use and maternal age.

Unweighted Model - not adjusted for complex survey sampling weights

Characteristic OR1 95% CI1 p-value
Maternal age grouped 1.10 1.06, 1.14 <0.001
VITAMIN_4plus.f


    3x/week or less — —
    4x/week or more 2.78 1.65, 4.93 <0.001
1 OR = Odds Ratio, CI = Confidence Interval

Weighted Model - adjusted for complex survey sampling weights

Weighted Model for Ever Breastfed by Age and Multivitamin Use
Beta SE Beta Odds Ratio p-value
Intercept -1.4192621 0.6957435 0.2418924 0.0417492
Maternal Age 0.0933435 0.0260497 1.0978387 0.0003639
Multivitamin 4x/wk or more 1.1739233 0.3343134 3.2346582 0.0004755