Table 4 Comparison of prevalence proportions calculated with different methods
From: Calculating incidence rates and prevalence proportions: not as simple as it seems
Prevalence proportion /1.000 | 1 year period prevalencea | Point prevalenceb | Contact prevalencea | Â | |||
|---|---|---|---|---|---|---|---|
|  | Numerator: | Existing episodes in 2012 | Existing episodes on 31 Dec 2012 | Number of persons with ≥1 contact in 2012 | Difference 1 year period prevalence point prevalence | Difference 1 year period prevalence contact prevalence | Difference point prevalence contact prevalence |
Denominator: | Person-years | Population on 31 Dec 2012 | Person-years | ||||
Long-lasting diagnosisc | ICPC | Mean | Mean | Mean | Mean (%) | Mean (%) | Mean (%) |
Contact dermatitis/ allergic eczema | S88 | 58.41 | 24.68 | 41.31 | 33.72 (136.6%) | 17.09 (41.4%) | −16.63 (−40.3%) |
Hayfever/allergic rhinitis | R97 | 47.96 | 21.77 | 35.28 | 26.19 (120.3%) | 12.68 (35.9%) | −13.51 (−38.3%) |
Constipation | D12 | 37.94 | 18.28 | 25.57 | 19.66 (107.5%) | 12.37 (48.4%) | −7.29 (−28.5%) |
Lumbar disc lesion. Back pain with radiating pain | L86 | 28.31 | 13.63 | 20.50 | 14.68 (107.7%) | 7.81 (38.1%) | −6.87 (−33.5%) |
Depressive disorder | P76 | 28.25 | 17.84 | 21.62 | 10.41 (58.3%) | 6.62 (30.6%) | −3.78 (−17.5%) |
Naevus/mole | S82 | 24.73 | 9.51 | 17.04 | 15.22 (160.1%) | 7.69 (45.1%) | −7.53 (−44.2%) |
Vitamin deficiency/other nutritional disorder | T91 | 22.33 | 12.55 | 17.70 | 9.78 (77.9%) | 4.64 (26.2%) | −5.14 (−39.1%) |
Shoulder syndrome | L92 | 20.81 | 8.79 | 14.62 | 12.02 (136.7%) | 6.19 (42.4%) | −5.83 (−39.9%) |
Tobacco abuse | P17 | 18.52 | 6.04 | 10.30 | 12.48 (206.6%) | 8.21 (79.7%) | −4.26 (−41.4%) |
Allergy/allergic reaction | A12 | 18.47 | 8.13 | 12.31 | 12.31 (127.2%) | 6.16 (50.0%) | −4.18 (−34.0%) |
Chronic diagnosisc | ICPC | Â | |||||
Uncomplicated hypertension | K86 | 139.92 | 144.96 | 94.78 | −5.04 (−3.5%) | 45.14 (47.6%) | 50.18 (52.9%) |
Asthma | R96 | 87.46 | 90.60 | 39.23 | −3.15 (− 3.5%) | 48.23 (122.9%) | 51.37 (130.9%) |
Atopic dermatitis/other eczema | S87 | 79.82 | 82.68 | 23.77 | −2.86 (−3.5%) | 56.05 (235.8%) | 58.91 (247.8%) |
Lipid metabolism disorder | T93 | 67.81 | 70.25 | 30.41 | −2.44 (−3.5%) | 37.40 (123.0%) | 39.84 (131.0%) |
Diabetes mellitus | T90 | 64.12 | 66.43 | 55.70 | −2.32 (−3.5%) | 8.41 (15.1%) | 10.73 (19.3%) |
Acquired deformity of limbs | L98 | 31.07 | 32.18 | 5.99 | −1.11 (−3.5%) | 25.07 (418.4%) | 26.19 (436.9%) |
Emphysema/chronic obstructive pulmonary disease | R95 | 29.72 | 30.79 | 20.47 | −1.07 (−3.5%) | 9.25 (45.2%) | 10.32 (50.4%) |
Osteoarthritis knee | L90 | 27.90 | 28.91 | 9.64 | −1.00 (−3.5%) | 18.26 (189.4%) | 19.26 (199.8%) |
Malignant neoplasm of skin | S77 | 25.71 | 26.64 | 8.98 | −0.92 (−3.5%) | 16.73 (186.3%) | 17.66 (196.6%) |
Angina pectoris | K74 | 25.39 | 26.30 | 12.31 | −0.91 (−3.5%) | 13.08 (106.3%) | 14.00 (113.7%) |