There are so many reasons why people might DNA and only a small minority will be people who CBA, a lot is down to NHS admin and lack of communication and continuity of care. Letters not being sent out on time or with exceptionally short notice (post marked less than 48hrs before the appointment); letters getting lost in the post (especially atm with postal strikes); no transport (cancelled public transport due to strikes/weather; lifts just not turning up etc); emergencies with children/family that take precedence (once missed a physio appointment because DD had had an accident at school and I was in A&E with her and I'd totally forgotten to call them); no or limited ways to cancel appointments (the phone just rings out and there's no way to even leave a message, if there's a contact number at all, or there's only someone in the booking office Monday and Tuesday so if you get a letter on Wednesday for a Monday appointment there is literally no way to cancel); messages not being passed on; different departments in the same hospital sending out appointments for the same time or overrunning (I once had 2 appointments in two different departments in the same hospital about 3hrs apart, I DNAed the second one because the first clinic was so behind I was called in for my 1st appointment 10 mins before I was supposed to be at the 2nd, and nobody answered when I tried to call the 2nd clinic reception when it was clear I wouldn't make both appts); patients being taken into hospital for another medical issue and informing their doctor of an existing appointment and then not passing on the message (happened to my great uncle a few weeks ago - was due to see rheumatology on a Tuesday afternoon but fell and broke his arm at work on Monday morning. It needed pins so they operated Monday afternoon and kept him on a ward. He explained he had an appointment on Tuesday afternoon and they promised they would inform the other dept that he was an inpatient. 2 weeks later he got a discharge letter from rheumatology for DNAing and he had to go through a whole string of phone calls and send them an email with his orthopedic discharge papers before they would accept that he had a valid reason for not attending and added him back to their list)
I had surgery in April this year ... And there were so many places where communication was lacking due to the non joined up nature of the NHS systems. It should have happened in January but due to another health issue it was postponed to March. In March, on the day of surgery it was cancelled (due to theatre staff having COVID they cancelled anything except emergency procedures due to staffing levels) and postponed till April.
Firstly for each surgery date I had to do a 2 week COVID isolation at home to make sure I didn't have it before my surgery ... For my January 19th surgery they called me on January 3rd to say my surgery date was the 19th and I needed to go into isolation as of the 5th. I work in retail so fortunately January is a pretty quiet month but even so it was massively short notice (I had told my boss that I was having surgery and knew it would be the start of the year, but not exactly when, but I expected I'd get more than 2 days notice).
When it was cancelled the first time I asked them to give me more notice for the second one ... Same thing happened, got a call on Friday saying I had to go into isolation from Monday ... two weeks later it ironically was cancelled due to staff having COVID. By the 3rd date at the end of April I knew I would t have much notice and again was told 4 days before I had to go into isolation, only to get to the hospital on the day to be told "Oh you don't have to do 2weeks now, just 48hrs from your COVID test ... did nobody tell you they'd changed things at the start of April?"
For each surgery date I had to arrange for the District Nurse to come 15 days after surgery to remove my staples as it apparently couldn't be done by my GPs practice nurse (Op was done at a hospital 3hrs away so not practical to return just for a few staples to be removed). Because the op was done in a different NHS trust they couldn't liase directly with the DN so I had to call them and leave a message saying when my op was and when I would need to see them but since they are only in the office Tuesday and Thursday 9-11am it took over a week for them to get back to me and confirm the appointment to come and visit me.
When the first two dates were cancelled I left multiple messages on the phone and email saying my surgery had been postponed and therefore no longer needed the appointment (both with at least a weeks notice) and could someone call me to confirm they had received the messages. Both times I had a DN turn up at my house on the appointment day and then act annoyed that I hadn't cancelled despite the evidence I had of calling/emailing to cancel.
My favourite miscommunication though was that after surgery I have follow up calls with the surgeon booked for 3 weeks post op, 6weeks post op, 12 weeks post op and then every three months for the first year. When I recieved the email with my surgery date (following the late notice phone call) I also received the dates for my follow ups. When my first two ops were postponed I asked if they were going to cancel my post op appointments and they said they would automatically be cancelled. I still recieved reminder texts and emails for each one and then messages saying I had DNAed so I had to call the office each time to be told "Oh sorry it's still in the system, I've sorted it so it won't happen again" (reader, it happened again and again and again). For my 3rd date I was booked in at the end of April which was 12 weeks after my original date. I'm day 2 post op and lying in my hospital bed when my phone rings so I answer it only to hear my surgeon introducing himself on the other end.
When I ask why he's calling me, considering that I'd seen him only an hour previously on his rounds, he was utterly confused as he was calling his January patients for their 3month follow up and he apologised as he assumed my file had got mixed up on his desk. Somehow my name was still on his January surgery list despite the fact I was physically in the hospital and he had operated on me less than 48hrs previously!
There are so many ways that things can be mismanaged when everyone on a supposedly National service cannot fully access all the information they need, and patients are blamed for things outside their control.