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Table 2 Descriptive statistics for individual, household, and environmental covariates included in regression analyses

From: Identifying individual, household and environmental risk factors for malaria infection on Bioko Island to inform interventions

Covariate

2015

2018

Total 2015 and 2018

Urban

Rural

All

Urban

Rural

All

Urban

Rural

All

(n = 14,476)

(n = 2427)

16,903

(n = 11,444)

(n = 2290)

13,734

(n = 25,920)

(n = 4,717)

(n = 30,637)

Sex

 Male

6295 (43.5)

1101 (45.4)

7396 (45.4)

5167 (45.2)

1152 (50.3)

6319 (46.0)

11,462 (44.22)

2253 (47.76)

13,715 (44.77)

 Female

8181 (56.5)

1326 (54.6)

9507 (54.6)

6277 (54.8)

1138 (49.7)

7415 (54.0)

14,458 (55.78)

2464 (52.24)

16,922 (55.23)

Age group

  < 5 years

3086 (21.3)

470 (19.4)

3556 (21.0)

1646 (14.4)

285 (12.5)

1931 (14.1)

4732 (18.3)

755 (16.0)

5487 (17.9)

 5–9 years

1909 (13.2)

329 (13.6)

2238 (13.2)

1450 (12.7)

279 (12.2)

1729 (12.6)

3359 (13.0)

608 (12.9)

3967 (12.9)

 10–14 years

1781 (12.3)

276 (11.4)

2057 (12.2)

1421 (12.4)

274 (12.0)

1695 (12.3)

3202 (12.4)

550 (11.7)

3752 (12.2)

 15–19 years

1422 (9.8)

160 (6.6)

1582 (9.4)

1127 (9.8)

200 (8.7)

1327 (9.7)

2549 (9.8)

360 (7.6)

2909 (9.5)

 20–29 years

3101 (21.4)

374 (15.4)

3475 (20.6)

2378 (20.8)

394 (17.2)

2772 (20.2)

5479 (21.1)

768 (16.3)

6247 (20.4)

 30–39 years

1580 (10.9)

253 (10.4)

1833 (10.8)

1534 (13.4)

278 (12.1)

1812 (13.2)

3114 (12.0)

531 (11.3)

3645 (11.9)

 40–49 years

731 (5.1)

219 (9.0)

950 (5.6)

642 (5.6)

154 (6.7)

796 (5.8)

1373 (5.3)

373 (7.9)

1746 (5.7)

 50–59 years

480 (3.3)

166 (6.8)

646 (3.8)

419 (3.7)

163 (7.1)

582 (4.2)

899 (3.5)

329 (7.0)

1228 (4.0)

  > 60 years

386 (2.7)

180 (7.4)

566 (3.4)

827 (7.2)

263 (11.5)

1090 (7.9)

1213 (4.7)

443 (9.4)

1656 (5.4)

Socioeconomic Status (Quantile)

 Poorest

3036 (21.0)

1443 (59.5)

4479 (26.5)

2616 (22.9)

1,022 (44.6)

3638 (26.5)

5652 (21.8)

2465 (52.3)

8117 (26.5)

 2nd

3812 (26.3)

532 (21.9)

4344 (25.7)

2911 (25.4)

527 (23.0)

3438 (25.0)

6723 (25.9)

1059 (22.5)

7782 (25.4)

 3rd

3840 (26.5)

281 (11.6)

4121 (24.4)

2980 (26.0)

454 (19.8)

3434 (25.0)

6820 (26.3)

735 (15.6)

7555 (24.7)

 Wealthiest

3788 (26.2)

171 (7.0)

3959 (23.4)

2937 (25.7)

287 (12.5)

3224 (23.5)

6725 (25.9)

458 (9.7)

7183 (23.4)

Household density

 Very low density

1585 (11.0)

483 (19.9)

2068 (12.2)

1388 (12.1)

448 (19.6)

1836 (13.4)

2973 (11.5)

931 (19.7)

3904 (12.7)

 Low density

4217 (29.1)

684 (28.2)

4901 (29.0)

2966 (25.9)

580 (25.3)

3546 (25.8)

7183 (27.7)

1264 (26.8)

8447 (27.6)

 Medium density

6104 (42.2)

708 (29.2)

6812 (40.3)

4341 (37.9)

712 (31.1)

5053 (36.8)

10,445 (40.3)

1420 (30.1)

11,865 (38.7)

 High density

1802 (12.4)

351 (14.4)

2153 (12.7)

1582 (13.8)

234 (10.2)

1816 (13.2)

3384 (13.1)

585 (12.4)

3969 (12.9)

 Very high density

768 (5.3)

201 (8.3)

969 (5.7)

1167 (10.2)

316 (13.8)

1483 (10.8)

1935 (7.5)

517 (11.0)

2452 (8.0)

LLIN Use

 Yes

7681 (53.1)

1312 (54.1)

8993 (53.2)

6633 (58.0)

1251 (54.6)

7884 (57.4)

14,314 (55.2)

2563 (54.3)

16,877 (55.1)

 No

6795 (46.9)

1115 (45.9)

7910 (46.8)

4811 (42.0)

1039 (45.4)

5850 (42.6)

11,606 (44.8)

2154 (45.7)

13,760 (44.9)

Travelled to continental Africa

 Yes

1933 (13.4)

134 (5.5)

2067 (12.2)

773 (6.8)

76 (3.3)

849 (6.2)

2706 (10.4)

210 (4.5)

2916 (9.5)

 No

12,543 (86.6)

2293 (94.5)

14,836 (87.8)

10,671 (93.2)

2214 (96.7)

12,885 (93.8)

23,214 (89.6)

4507 (95.5)

27,721 (90.55)

House has open eaves

 Yes

10,592 (73.2)

1191 (49.1)

11,783 (69.7)

7712 (67.4)

1345 (58.7)

9057 (66.0)

18,304 (70.6)

2536 (53.8)

20,840 (68.0)

 No

3884 (26.8)

1236 (50.9)

5120 (30.3)

3732 (32.6)

945 (41.3)

4677 (34.0)

7616 (29.4)

2181 (46.2)

9797 (32.0)

House has air conditioning

 Yes

2228 (15.4)

167 (6.8)

2395 (14.2)

2819 (24.6)

408 (17.8)

3227 (23.5)

5047 (19.5)

575 (12.2)

5622 (18.4)

 No

12,244 (84.6)

2260 (93.1)

14,504 (85.8)

8625 (75.4)

1882 (82.2)

10,507 (76.5)

20,869 (80.5)

4142 (87.8)

25,011 (81.6)

Environmental covariates, mean (sd)

 TCB

0.52 (0.08)

0.5 (0.14)

0.52 (0.09)

0.37 (0.03)

0.38 (0.03)

0.37 (0.03)

N/a

N/a

N/a

 TCW

− 0.01 (0.02)

0.03 (0.04)

0.00 (0.03)

− 0.02 (0.02)

0 (0.03)

− 0.02 (0.02)

N/a

N/a

N/a

 Elevation (meters)

71.67 (77.62)

284.09 (362.75)

102.98 (172.48)

70.54 (70.21)

299.54 (384.02)

110 (190.05)

N/a

N/a

N/a

 Temperature (C)

22.81 (3.61)

23.43 (4.43)

22.88 (3.78)

23.43 (2.12)

23.06 (2.67)

23.36 (2.23)

N/a

N/a

N/a

 EVI

0.24 (0.11)

0.46 (0.11)

0.27 (0.14)

0.25 (0.13)

0.49 (0.12)

0.29 (0.16)

N/a

N/a

N/a

 Slope

7.61 (4.15)

10.13 (6.33)

7.97 (4.61)

7.5 (4.07)

10.37 (6.30)

7.99 (4.65)

N/a

N/a

N/a