The phrase "out of spite" is so wildly inflammatory and subjective that I can't really believe it has been included in official stats, unless the point is to see how the language used skews the data.
'Denied access' is also pretty subjective, especially if there are raw feelings involved on either side, not to mention the obvious fact that everyone likes to come out of things looking as good as they can, so if a NRP is questioned on their lack of contact, are they more likely to say "I couldn't be arsed" or "RP won't let me"? There is a vast difference between denying all contact and refusing to be at the beck and call of a NRP as well.
I'm quite sure that if you asked my XP, he would say I have denied him contact, whereas I would say I have offered him plenty of contact that he has refused. It is partly a matter of perception, partly based on the outlook of the person you ask and the exact circumstances they are thinking of when answering.
I live quite a distance away from my XP so contact has always been in school holidays as it necessitates quite a trip. This has worked out well because he can usually hold it together for a day every now and again, but not if it is frequent. TBH he is only really capable of being an occasional DisneyDad, but that is better than nothing at all and at least those contact sessions are, for the most part, enjoyable for the DC and he actually remembers to turn up for them. I'm sure that if he were asked, he would say i was denying him contact by moving so far away whereas I would be inclined to say that slightly more frequent, but still sporadic visits from him were not enough of a reason to remain in an area that offered no benefits or opportunities for the DC on a daily basis and where we had no support network. One situation, 2 viewpoints, 2 different answers.
Equally, he is currently making noises about me denying him contact this summer. We had arranged at Xmas that he would come up at Easter. 2 days before he was due, he decided it wasn't convenient for him, so gave me 24 hours to give him a definite date in the summer holidays instead. Some of the things we had put off doing at Easter due to his visit were rearranged for the summer so there was no free time to arrange a meet up. To his mind that is me stopping contact since i won't acquiesce to his whim and accommodate his change in plans. To me it isn't, it is him stopping contact for his convenience and expecting it to be rearranged on his terms. Again, same situation but utterly different views which would lead to utterly different answers if we were questioned on it.