Tricky working with array result from $wpdb->get_results

I have a query that has a multidimensional array as a result:

<?php
$subpages = $wpdb->get_results("
SELECT post_title
FROM $wpdb->posts
INNER JOIN $wpdb->page2cat
ON $wpdb->page2cat.page_id = $wpdb->posts.ID
WHERE $wpdb->page2cat.pagecat_id = 2
");
?>

When I view the results of $subpages with print_r() I get this:

Array
(
[0] => stdClass Object
(
[post_title] => Test 1
)
[1] => stdClass Object
(
[post_title] => Test 2
)
[2] => stdClass Object
(
[post_title] => Test 3
)
)

I find it difficult working with this array, because I can’t access the values easy. There is a stdClass Object in each entry of the array. Does anyone know of a way to not get the stdClass Object or how to easily work with such an array?

For example, it would be easy if I could retrieve the value like $subpages[0] or $subpages['post_title'] as a one dimensional array.