Table 1 Socio-demographic and other characteristics according to malaria attacks and results of random-effect negative binomial regression models exploring factors associated with malaria clinical cases (n = 6558)
Characteristics | Subcategory | Number of observations n = 6558 n (%) | Malaria cases | Bivariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|---|---|---|
No, n = 6394 n (%) | Yes, n = 164 n (%) | IRR (95% CI) | P value | aIRR (95% CI) | P-value | |||
Socio-demographic characteristics | ||||||||
Age group | ||||||||
15–19 years (ref) | 1227 (18.71) | 1170 (18.30) | 57 (34.76) | 1 | 1 | |||
20–29 years | 1363 (20.78) | 1326 (20.74) | 37 (22.56) | 0.59 (0.39–0.89) | 0.013 | 0.68 (0.45–1.03) | 0.07 | |
30–44 years | 1771 (27.01) | 1735 (27.13) | 36 (21.95) | 0.44 (0.29–0.66) | < 0.001 | 0.45 (0.30–0.69) | < 0.001 | |
45–59 years | 1378 (21.01) | 1357 (21.22) | 21 (12.80) | 0.32 (0.20–0.53) | < 0.001 | 0.33 (0.20–0.54) | < 0.001 | |
60 years and over | 819 (12.49) | 806 (12.61) | 13 (7.93) | 0.34 (0.18–0.62) | < 0.001 | 0.33 (0.18–0.22) | < 0.001 | |
Sex | ||||||||
Male (ref) | 2780 (42.39) | 2699 (42.21) | 81 (49.39) | 1 | 1 | |||
Female | 3778 (57.61) | 3695 (57.79) | 83 (50.61) | 0.76 (0.55–1.05) | 0.09 | 0.89 (0.65–1.22) | 0.47 | |
Resident/quarter | ||||||||
No (ref) | 770 (11.74) | 753 (11.78) | 17 (10.37) | 1 | ||||
Yes | 5788 (88.26) | 5641 (88.22) | 147 (89.63) | 1.17 (0.71–1.95) | 0.53 | |||
Born at Dielmo | ||||||||
No (ref) | 1969 (30.02) | 1923 (30.08) | 46 (28.05) | 1 | ||||
Yes | 6558 (69.98) | 4471 (69.92) | 118 (71.95) | 1.11 (0.78–1.58) | 0.56 | |||
Pregnancy | ||||||||
No (ref) | 3567 (94.42) | 3495 (94.59) | 72 (86.75) | 1 | ||||
Yes | 211 (5.58) | 200 (5.41) | 11 (13.25) | 2.70 (1.43–5.12) | 0.002 | |||
Year of the use of LLINs (1) | ||||||||
Year before nets implementation (ref) | 756 (11.53) | 724 (11.32) | 32 (19.51) | 1 | 1 | |||
First year of the use of LLINs | 771 (11.76) | 766 (11.98) | 5 (3.05) | 0.14 (0.06–0.37) | < 0.001 | 0.14 (0.05–0.35) | < 0.001 | |
Second year of the use of LLINs | 818 (12.47) | 815 (12.75) | 3 (1.83) | 0.08 (0.02–0.27) | < 0.001 | 0.08 (0.02–0.25) | < 0.001 | |
Third year of the use of LLINs | 829 (12.64) | 788 (12.32) | 41 (25) | 1.09 (0.69–1.73) | 0.71 | 1.04 (0.66–1.64) | 0.88 | |
Fourth year of the use of LLINs | 808 (12.32) | 800 (12.51) | 8 (4.88) | 0.22 (0.10–0.47) | < 0.001 | 0.21 (0.09–0.44) | < 0.001 | |
Fifth year of the use of LLINs | 839 (12.79) | 828 (12.95) | 11 (6.71) | 0.29 (0.14–0.57) | < 0.001 | 0.27 (0.14–0.56) | < 0.001 | |
Sixth year of the use of LLINs | 873 (13.13) | 828 (12.90) | 48 (29.27) | 1.25 (0.81–1.95) | 0.32 | 1.16 (0.74–1.80) | 0.52 | |
Seventh year of the use of LLINs | 864 (13.17) | 848 (13.26) | 16 (9.76) | 0.41 (0.22–0.74) | 0.003 | 0.39 (0.21–0.70) | 0.002 | |
Rainfall | ||||||||
1.0001 (0.9996–1.0007) | 0.60 | 1.0002 (0.9997–1.0007) | 0.57 | |||||