Scrapping data by a specific element name - PhantomJS

I'm using PhantomJS to pull out some data from the twitter page. Here is a sample content that I'm trying to scrap:

541 replies .

This is my code for getting the reply count:

var replyCount = page.evaluate(function(){
 return document.getElementsByClassName("ProfileTweet-action--reply");
});
for (var i = 0; i < replyCount.length; i++) {
    var replyInt = replyCount[i].ierText;
    console.log(replyInt);
}

Output is 541 replies

Is there a way to scrap the value just for data-tweet-stat-count so I can get "541"?

There are also other elements with the same name data-tweet-stat-count in that page. Can anyone lead me on this?