Table 2.

Prevalence of subjective concentration and memory complaints by physical disease.

Physical disease	Category	Subjective concentration complaints	P-valuea	OR (95% CI)	Subjective memory complaints	P-valuea	OR (95% CI)
Allergy	No	21.2	<0.001	1.61 [1.29, 2.03]	29.1	<0.001	1.53 [1.29, 1.82]
	Yes	30.3			38.6
Arthritis	No	21.0	<0.001	1.54 [1.32, 1.81]	27.9	<0.001	2.07 [1.80, 2.37]
	Yes	29.1			44.4
Asthma	No	21.1	<0.001	1.72 [1.41, 2.09]	29.0	<0.001	1.60 [1.34, 1.91]
	Yes	31.5			39.5
Bladder problems/incontinence	No	21.4	<0.001	2.38 [1.85, 3.05]	29.0	<0.001	3.20 [2.51, 4.10]
	Yes	39.3			56.7
Bone, back, joint or muscle problems	No	19.2	<0.001	1.97 [1.73, 2.24]	26.1	<0.001	2.17 [1.92, 2.46]
	Yes	31.9			43.4
Bowel/colon problems	No	21.5	<0.001	1.75 [1.37, 2.24]	29.2	<0.001	1.90 [1.55, 2.34]
	Yes	32.3			43.9
Bronchitis/emphysema	No	21.8	0.002	1.61 [1.19, 2.19]	29.4	<0.001	2.44 [1.82, 3.26]
	Yes	31.0			50.4
Cancer	No	22.0	0.611	1.12 [0.72, 1.76]	29.7	0.005	1.89 [1.21, 2.95]
	Yes	24.0			44.4
Cataracts/eyesight problems	No	21.3	<0.001	1.29 [1.11, 1.49]	28.4	<0.001	1.58 [1.38, 1.81]
	Yes	25.9			38.5
Diabetes	No	21.8	0.086	1.26 [0.97, 1.63]	29.4	<0.001	1.65 [1.31, 2.06]
	Yes	26.0			40.7
Ear/hear problems	No	21.6	0.007	1.32 [1.08, 1.61]	28.8	<0.001	1.94 [1.59, 2.36]
	Yes	26.7			44.0
Epilepsy/fits	No	21.8	<0.001	3.43 [1.78, 6.61]	29.8	<0.001	3.12 [1.62, 6.03]
	Yes	48.9			56.9
Heart attack/angina	No	21.7	<0.001	1.79 [1.31, 2.45]	29.4	<0.001	2.63 [1.97, 3.50]
	Yes	33.2			52.2
High blood pressure	No	21.5	0.046	1.16 [1.00, 1.35]	28.3	<0.001	1.55 [1.35, 1.78]
	Yes	24.2			37.9
Infectious disease	No	21.9	0.033	2.14 [1.05, 4.39]	29.8	0.007	2.75 [1.28, 5.88]
	Yes	37.6			53.8
Liver problems	No	21.8	<0.001	3.61 [2.15, 6.06]	29.7	0.001	2.37 [1.40, 4.01]
	Yes	50.1			50.1
Migraine or frequent headaches	No	20.4	<0.001	2.66 [2.19, 3.24]	28.1	<0.001	2.61 [2.16, 3.16]
	Yes	40.5			50.5
Skin problems	No	20.8	<0.001	1.80 [1.50, 2.16]	28.7	<0.001	1.68 [1.40, 2.00]
	Yes	32.2			40.3
Stomach ulcer or other digestive problems	No	21.2	<0.001	2.07 [1.66, 2.57]	28.8	<0.001	2.34 [1.92, 2.84]
	Yes	35.7			48.6
Stroke	No	22.0	0.998	1.00 [0.46, 2.18]	29.8	0.110	1.70 [0.88, 3.27]
	Yes	22.0			41.9

Abbreviations: OR Odds ratio; CI Confidence interval.

Subjective concentration complaints were assessed with the following question: “In the past month, have you had any problems with concentrating on what you were doing?”. Subjective memory complaints were assessed with the following question: “Have you noticed any problems with forgetting things in the past month?”.

^aP-values were based on Chi-squared tests.