placestats

One-person households vs. Unintended pregnancies ending in abortion

Holds up after adjusting for income

Across 123 countries, One-person households and Unintended pregnancies ending in abortion rise and fall together at r = -0.18 (on a scale from −1 to +1, where 0 means no link). It holds up almost unchanged when only countries with similar income (GDP per person) are compared (r = -0.41, q = 0.032, allowing for the many pairs tested). Caution: direction is not consistent across regions.

Comparing countries across the middle half of unintended pregnancies ending in abortion, 31% to 58.9% of unintended pregnancies, one-person households is 3.07% of households lower at the top of that range than the bottom. Comparing only countries with similar national income, the gap is 4.91% of households.

Link before adjusting (r)-0.181p = 0.045 · 123 countries
After adjusting for national income-0.408p = 3.2e-6 · likely range [-0.55, -0.25]
p, allowing for regions0.021standard error 0.132 · 7 regions
Check for luck (q)0.032across 14,952 pairs

How to read these.r runs from −1 (one goes up as the other goes down) to +1 (they rise together), and 0 means no link. Adjusting for national income means comparing countries with the same GDP per person, so differences in wealth can’t explain the link. Income is used in percentage terms, since an extra $1,000 means more to a poor country than to a rich one. p is how likely a link this strong would be if there were really none. Below 0.05 means it is unlikely to be chance. Very small values are written in short form: 1.1e-32 means a decimal point followed by 31 zeros and then 11, so very close to zero. The likely range is where the true figure probably lies, and a range that crosses zero means the link could easily be chance. Countries in the same region tend to resemble each other, so the third figure allows for that, which gives a fairer p. The standard error is the typical size of the error in r. Finally, testing this many pairs means some will look strong by luck alone. A q below 0.05 means this link is unlikely to be one of those.

One-person households · % of householdslink with income +0.70 · high
Unintended pregnancies ending in abortion · % of unintended pregnancieslink with income +0.12 · independent

“Link with income” is how closely each measure tracks GDP per person across countries, from −1 to +1.

Every country as a dot

One-person households · % of households →Unintended pregnancies ending in abortion · % of unintended pregnancies →1.08%41.1%19.7%86.1%Angola: 10.8% of households, 28.1% of unintended pregnanciesAlbania: 9.95% of households, 59.2% of unintended pregnanciesArgentina: 22.8% of households, 48.4% of unintended pregnanciesArmenia: 15.2% of households, 81.8% of unintended pregnanciesAustralia: 22.8% of households, 43.1% of unintended pregnanciesBurundi: 6.04% of households, 26.2% of unintended pregnanciesBelgium: 34% of households, 37.1% of unintended pregnanciesBenin: 9.78% of households, 36.9% of unintended pregnanciesBurkina Faso: 6.64% of households, 40.6% of unintended pregnanciesBangladesh: 2.85% of households, 60.1% of unintended pregnanciesBulgaria: 30.8% of households, 35.7% of unintended pregnanciesBosnia and Herzegovina: 11.5% of households, 57.3% of unintended pregnanciesBelarus: 38% of households, 56% of unintended pregnanciesBelize: 17.2% of households, 45.2% of unintended pregnanciesBolivia: 20.5% of households, 36.3% of unintended pregnanciesBrazil: 12% of households, 48.4% of unintended pregnanciesBarbados: 26.3% of households, 58% of unintended pregnanciesBhutan: 6.13% of households, 67.9% of unintended pregnanciesCentral African Republic: 6.2% of households, 30% of unintended pregnanciesCanada: 28.2% of households, 36.8% of unintended pregnanciesChile: 20.2% of households, 52.5% of unintended pregnanciesCote d'Ivoire: 17% of households, 36.7% of unintended pregnanciesCameroon: 15.3% of households, 40.7% of unintended pregnanciesCongo, Dem. Rep.: 7.55% of households, 27.9% of unintended pregnanciesCongo, Rep.: 13.8% of households, 42.6% of unintended pregnanciesColombia: 11.1% of households, 43.2% of unintended pregnanciesComoros: 4.91% of households, 32.4% of unintended pregnanciesCosta Rica: 12.1% of households, 41% of unintended pregnanciesCzechia: 32.5% of households, 19.7% of unintended pregnanciesGermany: 37.3% of households, 27.1% of unintended pregnanciesDominican Republic: 20.1% of households, 44% of unintended pregnanciesSpain: 23.2% of households, 43.1% of unintended pregnanciesEthiopia: 6.36% of households, 31% of unintended pregnanciesFinland: 41% of households, 24.8% of unintended pregnanciesFrance: 35.5% of households, 49.5% of unintended pregnanciesGabon: 22.4% of households, 36.8% of unintended pregnanciesUnited Kingdom: 30.6% of households, 36.2% of unintended pregnanciesGeorgia: 15% of households, 86.1% of unintended pregnanciesGhana: 21.5% of households, 35.9% of unintended pregnanciesGuinea: 5.07% of households, 38.1% of unintended pregnanciesGambia, The: 9.72% of households, 31.1% of unintended pregnanciesGuinea-Bissau: 4.14% of households, 58.5% of unintended pregnanciesGreece: 25.7% of households, 45.8% of unintended pregnanciesGuatemala: 4.33% of households, 30.1% of unintended pregnanciesGuyana: 15.8% of households, 47.5% of unintended pregnanciesHong Kong SAR, China: 18.3% of households, 46.1% of unintended pregnanciesHonduras: 10.4% of households, 30.6% of unintended pregnanciesCroatia: 24.6% of households, 49.9% of unintended pregnanciesHaiti: 9.43% of households, 35.5% of unintended pregnanciesHungary: 32.1% of households, 49.4% of unintended pregnanciesIndonesia: 7.1% of households, 63% of unintended pregnanciesIndia: 5.11% of households, 77.1% of unintended pregnanciesItaly: 31.1% of households, 67.1% of unintended pregnanciesJamaica: 28.2% of households, 43.9% of unintended pregnanciesJapan: 34.5% of households, 30.1% of unintended pregnanciesKazakhstan: 15.5% of households, 82.1% of unintended pregnanciesKenya: 19.4% of households, 38% of unintended pregnanciesKyrgyz Republic: 12.3% of households, 79.2% of unintended pregnanciesCambodia: 3.37% of households, 65.3% of unintended pregnanciesKorea, Rep.: 31.8% of households, 61.9% of unintended pregnanciesLao PDR: 3.18% of households, 68.3% of unintended pregnanciesLiberia: 12% of households, 40.4% of unintended pregnanciesSt. Lucia: 26.8% of households, 54.6% of unintended pregnanciesLesotho: 18% of households, 23.9% of unintended pregnanciesLithuania: 31.7% of households, 27.7% of unintended pregnanciesLatvia: 41.1% of households, 30.2% of unintended pregnanciesMoldova: 22.6% of households, 70.6% of unintended pregnanciesMadagascar: 7.11% of households, 62.8% of unintended pregnanciesMaldives: 4.49% of households, 70.5% of unintended pregnanciesMexico: 10.1% of households, 50.9% of unintended pregnanciesNorth Macedonia: 11.8% of households, 63.4% of unintended pregnanciesMali: 3.11% of households, 33.5% of unintended pregnanciesMyanmar: 5.35% of households, 74.2% of unintended pregnanciesMontenegro: 15.4% of households, 54.2% of unintended pregnanciesMongolia: 8.96% of households, 65.7% of unintended pregnanciesMozambique: 8.41% of households, 46.7% of unintended pregnanciesMauritania: 3.97% of households, 25.4% of unintended pregnanciesMalawi: 7.2% of households, 27.4% of unintended pregnanciesNamibia: 17.4% of households, 27.9% of unintended pregnanciesNiger: 3.19% of households, 31.3% of unintended pregnanciesNigeria: 14.7% of households, 48.2% of unintended pregnanciesNorway: 39.6% of households, 31.7% of unintended pregnanciesNepal: 4.51% of households, 69.4% of unintended pregnanciesNew Zealand: 21.9% of households, 29.3% of unintended pregnanciesPakistan: 1.08% of households, 60.9% of unintended pregnanciesPanama: 13.4% of households, 41.3% of unintended pregnanciesPeru: 16.8% of households, 47.5% of unintended pregnanciesPhilippines: 9.18% of households, 50.5% of unintended pregnanciesPoland: 24% of households, 36.6% of unintended pregnanciesPuerto Rico (US): 23.1% of households, 58.3% of unintended pregnanciesPortugal: 21.4% of households, 32.4% of unintended pregnanciesParaguay: 10.4% of households, 51% of unintended pregnanciesRomania: 26% of households, 71.2% of unintended pregnanciesRussian Federation: 25.7% of households, 71.8% of unintended pregnanciesRwanda: 7.69% of households, 28.7% of unintended pregnanciesSenegal: 6.92% of households, 25.1% of unintended pregnanciesSingapore: 16.1% of households, 27.5% of unintended pregnanciesSierra Leone: 6.42% of households, 51.5% of unintended pregnanciesEl Salvador: 8.46% of households, 41.5% of unintended pregnanciesSomalia, Fed. Rep.: 1.53% of households, 29.2% of unintended pregnanciesSerbia: 21.8% of households, 60.8% of unintended pregnanciesSao Tome and Principe: 13.8% of households, 29.6% of unintended pregnanciesSuriname: 14% of households, 46.5% of unintended pregnanciesSlovak Republic: 25.3% of households, 26.2% of unintended pregnanciesSlovenia: 32.6% of households, 24.4% of unintended pregnanciesEswatini: 21.7% of households, 26.5% of unintended pregnanciesChad: 5.43% of households, 29.5% of unintended pregnanciesTogo: 15.7% of households, 32.2% of unintended pregnanciesThailand: 21.6% of households, 64.4% of unintended pregnanciesTajikistan: 2.88% of households, 71% of unintended pregnanciesTurkmenistan: 3.74% of households, 83.4% of unintended pregnanciesTimor-Leste: 6.41% of households, 67.8% of unintended pregnanciesTonga: 6.94% of households, 52% of unintended pregnanciesTanzania: 9.63% of households, 35.9% of unintended pregnanciesUganda: 13.2% of households, 29.7% of unintended pregnanciesUkraine: 25% of households, 75.9% of unintended pregnanciesUruguay: 17.6% of households, 27.6% of unintended pregnanciesUnited States: 27.9% of households, 34.2% of unintended pregnanciesViet Nam: 10.5% of households, 74.5% of unintended pregnanciesSamoa: 4.4% of households, 64.5% of unintended pregnanciesSouth Africa: 23.8% of households, 36.6% of unintended pregnanciesZambia: 7.97% of households, 28.2% of unintended pregnanciesZimbabwe: 12.9% of households, 24.8% of unintended pregnanciesBDIBLRDEUFININDITALVAMRTSOMTJKTKMUKR

best-fit line line after adjusting

Four ways to measure the link

MethodrpCountries
Standard (Pearson), not adjusted-0.1810.045123
By rank (Spearman), not adjusted-0.1490.101123
Standard (Pearson), adjusted for national income-0.4083.2e-6123
By rank (Spearman), adjusted for national income-0.3614.4e-5123

The rank version uses only each country’s place in line, from lowest to highest, so a few extreme countries count for less. The adjusted and unadjusted versions use the same 123 countries: those that report both measures and GDP per person. So the gap between them comes from the adjustment, not from a change in which countries are counted. Drop in the size of r after adjusting: -0.227 (a minus sign means it grew).

How solid is it?

Leaving out one country at a time, r ranges from -0.445 (without SGP) to -0.384 (without TKM). The bar above shows that range on a scale from −1 to +1, with the solid line at the full result. The single country that moves r most: SGP (-0.037).

Fragile: this link may not hold up.
  • direction is not consistent across regions

Within each region

Countries are not separate, unrelated cases, and neighbors share a lot. A link that holds inside each region is far more believable than one that shows up only when comparing regions.

nr
East Asia & Pacific17-0.04
Europe & Central Asia35-0.39
Latin America & Caribbean23+0.43
Sub-Saharan Africa40+0.01

By income third

If the link shows up only in the richest third of countries, it is a feature of rich countries, not a general pattern.

nr
Poorest third41-0.42
Middle third41-0.37
Richest third41-0.27

By largest religious group

Countries grouped by a label they share, such as main religion, rather than by a number. Groups of fewer than twelve countries are not shown. These groups differ in income, region and history all at once. So a gap between them is a place to start asking questions, not an answer.

nr
Christians83-0.27
Muslims24-0.24

By last european coloniser

Countries grouped by a label they share, such as main religion, rather than by a number. Groups of fewer than twelve countries are not shown. These groups differ in income, region and history all at once. So a gap between them is a place to start asking questions, not an answer.

nr
France20-0.30
Never a European colony13-0.74
Spain15+0.08
United Kingdom33-0.54

Without outliers (countries far outside the middle half of countries on either measure, by more than one and a half times the width of that middle half): r = -0.408 after dropping 0 countries.

Two series, one country

Both measures over the years for one country you pick. The two charts are stacked so they share only the years along the bottom.

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Over time, within countries

Everything above compares countries with each other at one moment. This section compares each country only with itself over 0years. So a link here can’t come from anything about a country that stays the same, such as its history, geography, institutions or culture.

Not enough history inside each country to look at this over time. That needs countries measured for several years in a row, and at least one of these measures is measured too rarely.

The data


% of households
% of unintended pregnancies		Years
Latvia LVA41.1%30.2%2021, 2019
Finland FIN41%24.8%2010, 2019
Norway NOR39.6%31.7%2011, 2019
Belarus BLR38%56%2019
Germany DEU37.3%27.1%2011, 2019
France FRA35.5%49.5%2015, 2019
Japan JPN34.5%30.1%2015, 2019
Belgium BEL34%37.1%2011, 2019
Slovenia SVN32.6%24.4%2015, 2019
Czechia CZE32.5%19.7%2011, 2019
Hungary HUN32.1%49.4%2011, 2019
Korea, Rep. KOR31.8%61.9%2020, 2019
Lithuania LTU31.7%27.7%2011, 2019
Italy ITA31.1%67.1%2011, 2019
Bulgaria BGR30.8%35.7%2011, 2019

United Nations, Department of Economic and Social Affairs, Population Division (2022). Database on Household Size and Composition 2022.
Bearak, J. M., Popinchalk, A., Beavin, C. et al. (2022), 'Country-specific estimates of unintended pregnancy and abortion incidence: a global comparative analysis of levels in 2015-2019', BMJ Global Health 7(3), e007151. Guttmacher Institute. Supplementary appendix, tables A3-A5.

Sources

One-person households

Share of one-person households

United Nations Department of Economic and Social Affairs, Population Division · via Our World in Data · CC BY 3.0 IGO · updated irregular (2017, 2019 and 2022 editions)

Households of one person, from the same UN collection as the single-parent share and with the same limits: one to three readings per country, from sources that sort households differently, and few after 2019. It rises with age and with income, and falls with family size. That is three different things in one number. No "better" direction is set.

Unintended pregnancies ending in abortion

Share of unintended pregnancies ending in abortion (model estimate, 2015-2019)

Guttmacher Institute (Bearak et al. 2022, BMJ Global Health) · CC BY-NC 4.0 · updated one edition (2015-2019 estimates, published 2022)

Of the unintended pregnancies in the abortion rate's model, the share that ended in abortion, averaged over 2015-2019 (Guttmacher Institute). The rest ended in a birth or a miscarriage. Like the other two, it is an estimate with a range. No "better" direction is set.

How this was computed

Data used: most recent value in 2010-2025; values come from 2010–2021. To adjust for income, each measure is first predicted from GDP per person (in percentage terms, on a log scale) with a straight-line fit. Only what is left over is then compared. This is called a partial correlation. The line is drawn the standard way (ordinary least squares), which picks the line that comes closest to all the countries at once. The error margins allow for countries in the same region resembling each other, using 7 World Bank regions. The q-value corrects for testing all 14,952 pairs at once, using the Benjamini–Hochberg method. Underlying data last updated DYB 2024. How the country data works · explore One-person households and Unintended pregnancies ending in abortion

This page shows that two measures go together. It does not show that One-person households changes Unintended pregnancies ending in abortion, or the reverse. These figures also describe countries, not individual people. See the ecological fallacy.

More links with One-person households or Unintended pregnancies ending in abortion