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. 2018 Jun 9;8(6):e021597. doi: 10.1136/bmjopen-2018-021597

Table 4.

A selection of geo-data within GECCO and within each individual cohort study*†‡

Spatial scale The Netherlands GECCO
(all cohort studies)
Generations2-study Longitudinal Aging
Study Amsterdam
Netherlands Longitudinal
Study on Hearing
Netherlands Study of Depression and Anxiety Netherlands Twin
Register
New Hoorn Study
Spatial distribution of cohort study
Local versus nationwide cohort study Nationwide Nationwide Nationwide Nationwide Nationwide Nationwide Local
Municipalities inhabited by participants (n (%))‡ Municipality 458 458 (100.0) 53 (12.9) 90 (19.7) 288 (62.9) 205 (44.8) 458 (100.0) 3 (0.7)
Population and households
Number of men and women (Median (IQR)) PC4 2595.0
(680.0–6696.3)
7980.0
(4805–11 190.0)
9045.0
(5355.0–12 342.5)
8950.0
(5775.0–11 940.0)
8345.0
(5500.0–11 045.0)
9355.0
(6340–12 470.0)
7540.0
(4595.0–10 625.0)
9540.0
(5095.0–11 450.0)
Percentage of residents (≥65 years) (Median (IQR)) Neighbourhood 13.0 (9.0–18.0) 13.0 (8.0–17.0) 12.0 (8.0–16.0) 14.0 (10.0–20.0) 13.0 (8.0–17.0) 12.0 (7.0–17.0) 13.0 (9.0–17.0) 11.0 (7.0–18.0)
Percentage of Western immigrants (Median (IQR)) Neighbourhood 8.0 (6.0–11.0) 8.0 (5.0–10.0) 9.0 (7.0–14.0) 7.0 (4.0–10.0) 9.0 (7.0–11.0) 10.0 (7.0–14.0) 8.0 (5.0–10.0) 8.0 (6.0–9.0)
Percentage of non-Western immigrants (Median (IQR)) Neighbourhood 5.0 (2.0–13.0) 4.0 (2.0–11.0) 10.0 (4.0–18.0) 5.0 (2.0–14.5) 6.0 (3.0–12.0) 7.0 (4.0–17.0) 4.0 (2.0–9.0) 9.0 (4.0–14.0)
Average household size (Mean (SD)) PC4 2.3 (0.3) 2.4 (0.3) 2.2 (0.4) 2.3 (0.4) 2.3 (0.4) 2.1 (0.4) 2.4 (0.3) 2.3 (0.2)
Housing stock (Median (IQR)) Neighbourhood 1370.0
(710.0–2440.0)
1195.0
(610.0–2210.0)
1725.0
(905.0–3390.0)
1175.0
(500.0–2130.0)
1390.0
(762.5–2605.0)
1817.5
(785.0–3610.0)
1260.0
(635.0–2215.0)
730.0
(430.0–920.0)
Socioeconomic status
Socioeconomic status score (Median (IQR)) PC4 0.21
(−0.46 to 0.65)
0.27
(−0.22 to 0.67)
0.68
(−0.15 to 1.13)
0.32
(−0.20 to 0.50)
0.28
(−0.39 to 0.72)
0.09
(−0.96 to 0.63)
0.32
(−0.17 to 0.71)
−0.04
(−0.15 to 0.16)
Home value (in €1000,-) (Median (IQR)) Neighbourhood 197.0
(155.0–242.0)
205.0
(165.0–248.0)
244.0
(198.0–296.0)
193.0
(164.0–244.0)
200.0
(162.0–247.0)
207.0
(151.3–253.0)
208.0
(168.0–248.0)
175.0
(152.0–220.0)
Social security
Number of social security beneficiaries per 1000 households (Mean (SD)) Neighbourhood 46.0 (48.2) 38.1 (40.8) 34.0 (36.9) 42.2 (41.4) 41.5 (40.6) 54.4 (53.4) 36.5 (39.6) 37.0 (36.2)
Number of incapacity benefits per 1000 residents (15–64 years old)
(Mean (SD))
Neighbourhood 78.5 (35.3) 77.1 (30.3) 65.5 (24.6) 88.4 (37.1) 74.6 (25.4) 73.1 (38.3) 75.0 (28.2) 101.1 (30.3)
Noise
Road-traffic, rail-traffic and air-traffic noise (in dB (A)) (Mean (SD)) PC6 53.5 (5.8) 53.1 (5.7) 55.8 (4.8) 53.9 (5.7) 53.9 (5.5) 54.8 (3.3) 52.9 (5.9) 53.8 (4.1)
Air pollution
Mass concentration of NOx (in µg/m3) (Mean (SD)) PC6 35.2 (11.5) 34.0 (10.6) 38.2 (14.0) 35.6 (12.4) 36.2 (11.6) 40.0 (12.2) 33.4 (10.5) 32.5 (4.6)
Reflectance of PM2.5 filters (in 10–5/m) (Mean (SD)) PC6 1.3 (0.2) 1.2 (0.2) 1.3 (0.3) 1.2 (0.3) 1.3 (0.3) 1.4 (0.3) 1.2 (0.2) 1.1 (0.1)
Mass concentration of PM2.5 (in µg/m3) (Mean (SD)) PC6 16.6 (0.7) 16.5 (0.7) 16.3 (0.6) 16.4 (0.8) 16.6 (0.7) 16.4 (0.6) 16.5 (0.7) 15.9 (0.2)
Mass concentration of PMcoarse (in µg/m3) (Mean (SD)) PC6 8.4 (0.8) 8.3 (0.8) 8.7 (1.1) 8.5 (1.0) 8.5 (0.9) 8.8 (1.1) 8.2 (0.7) 8.2 (0.3)
Mass concentration of NO2 (in µg/m3) (Mean (SD)) PC6 24.4 (6.8) 23.7 (6.3) 26.0 (7.7) 23.7 (7.0) 25.2 (6.9) 27.9 (7.5) 23.3 (6.2) 22.7 (2.3)
Liveability
Liveability (n (%)) PC4
 Extremely negative 27 635 (0.2) 37 (0.1) 0 (0.0) 2 (0.1) 0 (0.0) 6 (0.2) 29 (0.1) 0 (0.0)
 Very negative 195 255 (1.2) 207 (0.5) 0.0 (0.0) 12 (0.6) 7 (0.7) 9 (0.3) 179 (0.5) 0 (0.0)
 Moderate 766 535 (4.7) 1349 (3.0) 12 (6.0) 159 (7.5) 30 (3.0) 265 (8.9) 883 (2.5) 0 (0.0)
 Moderate positive 2 219 065 (13.7) 4921 (11.1) 20 (10.0) 241 (11.4) 126 (12.7) 603 (20.3) 3418 (9.6) 513 (18.3)
 Positive 5 827 290 (35.8) 16 844 (37.8) 70 (34.8) 580 (27.3) 438 (44.2) 1298 (43.7) 12 165 (34.3) 2293 (81.7)
 Very positive 7 047 355 (43.3) 20 661 (46.4) 94 (46.8) 1110 (52.3) 378 (38.1) 772 (26.0) 18 307 (51.7) 0 (0.0)
 Extremely positive 183 105 (1.1) 493 (1.1) 5 (2.4) 17 (0.8) 12 (1.3) 17 (0.6) 442 (1.3) 0 (0.0)
 Urbanisation grade
Urbanised area
(yes (n (%))
Neighbourhood 10 099 420 (61.8) 25 702 (58.8) 142 (71.4) 1194 (58.7) 685 (70.1) 2278 (76.7) 18 947 (54.5) 2456 (88.9)

*Table 4 presents data for all cohort studies in 2006, except for the Generations2-study. For the Generations2-study geo-data from 2009 are shown.

†The sample size may vary for some variables, because of missing values. Means and SD are presented for normally distributed continuous variables. Medians and IQR are presented for skewed continuous variables. Frequencies and proportions are presented for categorical variables.

‡In 2006 and 2009, there were 458 and 411 municipalities in the Netherlands, respectively.

dB(A), A-weighted decibels; GECCO, Geoscience and Health Cohort Consortium; n, number of observations; NO2, nitrogen dioxide; NOx, nitrogen oxides; PC4, 4-digit postal code; PC6, 6-digit postal code; PMcoarse, particulate matter with diameter 2.5–10 µm; PM2.5, particulate matter with diameter ≤2.5 µm.