Table 3.

Response rates and PR for response rates by demographic characteristics for the NMS (1995–2018)

Year of survey	1995a			2006			2010			2014			2018
Number sampled	N = 3570			N = 4727			N = 9851			N = 9786			N = 15,528
	%	PR	95%CI	%	PR	95%CI	%	PR	95%CI	%	PR	95%CI	%	PR	95%CI
Age (years)
16–24	51.6	0.66	0.61, 0.70	50.2	0.73	0.68, 0.78	37.5	0.59	0.56, 0.63	31.4	0.58	0.54, 0.63	16.7	0.51	0.46, 0.56
25–29	65.2	0.83	0.79, 0.87	58.9	0.86	0.81, 0.91	51.0	0.81	0.77, 0.84	44.3	0.82	0.78, 0.87	25.3	0.77	0.72, 0.82
30–34	78.7	–	–	68.9	–	–	63.3	–	–	53.8	–	–	32.9	–	–
> = 35	81.5	1.04	0.98, 1.10	68.1	0.99	0.94, 1.05	65.6	1.04	0.99, 1.08	55.0	1.02	0.97, 1.08	36.3	1.10	1.04, 1.17
Marital status
Married	N/A	N/A	N/A	65.9	–	–	60.5	–	–	53.5	–	–	34.9	–	–
Joint registration (same address)	N/A	N/A	N/A	61.3	0.93	0.88, 0.98	52.4	0.87	0.83, 0.90	45.8	0.86	0.82, 0.90	26.7	0.76	0.72, 0.81
Joint registration (different address)	N/A	N/A	N/A	44.2	0.67	0.60, 0.75	34.0	0.56	0.51, 0.62	27.2	0.51	0.46, 0.56	13.2	0.38	0.33, 0.43
Sole registration	N/A	N/A	N/A	40.9	0.62	0.54, 0.72	34.1	0.56	0.50, 0.63	25.8	0.48	0.42, 0.56	14.3	0.41	0.34, 0.49
Country of birth
UK	N/A	N/A	N/A	65.7	–	–	56.8	–	–	48.7	–	–	31.4	–	–
Not UK	N/A	N/A	N/A	45.8	0.70	0.65, 0.75	46.2	0.81	0.78, 0.85	41.1	0.84	0.80, 0.89	23.2	0.74	0.70, 0.79
Index of multiple deprivation
1st (most deprived)	N/A	N/A	N/A	46.4	0.63	0.59, 0.68	40.2	0.58	0.55, 0.62	33.4	0.55	0.52, 0.59	17.2	0.42	0.39, 0.45
2nd	N/A	N/A	N/A	58.2	0.79	0.74, 0.85	48.1	0.70	0.66, 0.73	43.8	0.72	0.68, 0.77	25.5	0.62	0.57, 0.67
3rd	N/A	N/A	N/A	67.8	0.92	0.87, 0.98	59.4	0.86	0.82, 0.90	51.3	0.85	0.80, 0.90	32.2	0.78	0.73, 0.84
4th	N/A	N/A	N/A	70.7	0.96	0.91, 1.03	64.9	0.94	0.89, 0.99	54.9	0.91	0.85, 0.96	37.1	0.90	0.84, 0.97
5th (least deprived)	N/A	N/A	N/A	73.3	–	–	69.1	–	–	60.6	–	–	41.2	–	–

^a Data were not available on marital status, country of birth or IMD for non-respondents in the 1995 survey