Individual courses of low back pain in adult Danes: a cohort study with 4-year and 8-year follow-up

Table 2 Drop-out analyses

LBP	Reported previously	Age 45		Age 49
		%	[95% CI]	%	[95% CI]
‘year’	no	11.7	[6.1;17.4]	19.1	[11.6;26.6]
	yes	17.3	[12.8;21.7]	14.3	[9.8;18.8]
‘month’	no	14.4	[9.9;18.9]	14.0	[8.8;19.1]
	yes	17.1	[11.5;22.8]	17.8	[11.9;23.6]
‘>30 days’	no	13.9	[10.0;17.4]	14.0	[9.7;18.2]
	yes	20.6	[12.6;28.6]	21.1	[12.5;29.7]
‘seeking care’	no	14.4	[10.4;18.4]	14.1	[9.8;18.5]
	yes	18.4	[11.2;25.7]	20.0	[12.0;28.0]
‘non-trivial’	no	14.6	[10.8;18.4]	14.4	[10.2;18.5]
	yes	19.7	[10.6;28.9]	21.4	[11.6;31.3]
sex	male	18.7	[13.2;24.2]	31.3	[24.8;37.8]
	female	12.6	[8.1;17.1]	26.6	[20,7;32.6]

The percentages of people dropping out at the age of 45 and 49 by LBP definition at the previous survey and by sex

ISSN: 1471-2474