How to get text() from checkbox if is checked?

I know this question has been asked many times, and I have found a few answers on how to get text() from checkbox, but when I tried to get text only from checked one, is when my code has some errors.

Consider this code:

$('input.choose-age').on('change', function() {
  $('input.choose-age').not(this).prop('checked', false);
});

<script src="http://ift.tt/1oMJErh"></script>
<div class="checkbox">
  <label for='wom-10-14' class="checkbox-inline">
        <input type="checkbox" id='wom-10-14' class='choose-age' checked />10-14
  </label>
  <label for='wom-15-19' class="checkbox-inline">
        <input type="checkbox" id='wom-15-19' class='choose-age' />15-19
  </label>
  <label for='wom-10-19' class="checkbox-inline">
        <input type="checkbox" id='wom-10-19' class='choose-age' />10-19
  </label>
</div>

I want to select text() from checkbox if is checked and save it into a var. I am using d3.js and mapbox to run a mapDraw function, so I want to change indicators if a different checkbox is checked.

I know that this example returns the text, however is not what I'm looking for:

var ageLab = $('label[for=wom-10-14]').text();

This is what I tried:

1.

var ageLab = $('input:checkbox:checked').map(function() {
    return $(this).prev('label.checkbox-inline').text();
}).get();

console.log(ageLab);

Source: example 1

It returns:

Array[1]
    0: ""
    length: 1

2

var ageLab = $('.choose-age:checked').text(this.checked ? $(this).text() : '');

Source: example 2

However, it doesn´t returns text.

Is there a better way to get text() from checkbox when is checked.

Thanks in advance!