Table 1 Child, maternal, and parental characteristics with and without CP
From: Cerebral palsy risk in relation to parental age: insights from a matched case-control study
Variables | Children without CP (N1 = 134) n1 (%) | Children with CP (N2 = 134) n2 (%) | χ2 | p-value |
|---|---|---|---|---|
Child’s age (months) |  |  | - | - |
 < 6 | 3 (2.2) | 3 (2.2) | ||
 6–12 | 20 (14.9) | 20 (14.9) | ||
 12–24 | 44 (32.9) | 44 (32.9) | ||
 24–36 | 59 (44.0) | 59 (44.0) | ||
 36 and above | 8 (6.0) | 8 (6.0) | ||
Child gender | Â | Â | 8.011 | 0.005 |
 Male | 57 (21.3) | 35 (13.1) | ||
 Female | 77 (28.7) | 99 (36.9) | ||
Child position in family | Â | Â | 2.232 | 0.508 |
 1 | 55 (20.5) | 65 (24.3) | ||
 2 | 36 (13.4) | 30 (11.2) | ||
 3 | 27 (10.1) | 28 (10.4) | ||
 4 and above | 16 (6.0) | 11 (4.1) | ||
Maternal age (years) | Â | Â | 11.036 | 0.026 |
 20–24 | 23 (8.6) | 15 (5.6) | ||
 25–29 | 43 (16.0) | 26 (9.7) | ||
 30–34 | 42 (15.7) | 52 (19.4) | ||
 35–39 | 22 (8.2) | 31 (11.6) | ||
 ≥ 40 | 4 (1.5) | 10 (3.7) | ||
Mean ± SD | 31.1 ± 5.8 | 29.6 ± 5.7 | ||
Parity | Â | Â | 9.787 | 0.002 |
 Multiparous | 94 (35.1) | 69 (25.7) | ||
 Primiparous | 40 (14.9) | 65 (24.3) | ||
Paternal age | Â | Â | 13.243 | 0.021 |
 ≤25 | 4 (1.5) | 4 (1.5) | ||
 26-30 | 29 (10.8) | 11 (4.1) | ||
 31-35 | 41 (15.3) | 46 (17.2) | ||
 36-40 | 44 (16.4) | 42 (15.7) | ||
 41-45 | 11 (4.1) | 22 (8.2) | ||
 ≥ 46 | 5 (1.9) | 9 (3.4) | ||
Mean ± SD | 36.3 ± 6.5 | 34.9 ± 6.4 | ||
Mean parental age | Â | Â | 12.191 | 0.016 |
 Mean ± SD | 33.9 ± 5.9 | 32.6 ± 5.7 | ||
Religion | Â | Â | 0.982 | 0.322 |
 Christianity | 82 (30.6) | 80 (31.0) | ||
 Islamic | 52 (19.4) | 60 (22.4) | ||
Parity | Â | Â | 9.877 | 0.002 |
 Multiparous | 69 (25.7) | 94 (35.1) | ||
 Primiparous | 65 (24.3) | 40 (14.9) | ||
Father’s level of income |  |  | 5.976 | 0.049 |
 Low | 99 (36.9) | 81 (30.2) | ||
 Medium | 31 (11.6) | 44 (16.4) | ||
 High | 4 (1.5) | 9 (3.4) | ||
Mother’s level of income |  |  | 3.428 | 0.180 |
 Low | 95 (35.4) | 96 (35.8) | ||
 Medium | 22 (8.2) | 29 (10.8) | ||
 High | 17 (6.3) | 9 (3.4) | ||
Father’s level of education |  |  | 40.525 | 0.000 |
 Primary | 4 (1.5) | 26 (9.7) | ||
 Secondary | 77 (28.7) | 94 (35.1) | ||
 Tertiary | 53 (19.8) | 14 (5.2) | ||
Mother’s level of education |  |  | 7.606 | 0.022 |
 Primary | 17 (6.3) | 17 (6.3) | ||
 Secondary | 80 (29.9) | 98 (36.6) | ||
 Tertiary | 37 (13.8) | 19 (7.1) |