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. 2020 Dec 23;4(1):e222. doi: 10.1002/hsr2.222

TABLE 2.

Sickle cell disease features and severity among children, Kano, Nigeria (N = 372)

Frequency n (%)
Hb genotype
HbSS 346 (93.0)
HbSC 26 (7.0)
Age at diagnosis (year(s))
≤1 264 (71.0)
2 61 (16.4)
3 25 (6.7)
≥4 22 (5.9)
Range (0.5‐11.0 years)
Clinic attendance
Regular 334 (89.8)
Missed some appointments 38 (10.2)
Adherence to prophylactic medications
Yes 370 (99.5)
No 2 (0.5)
Vaso‐occlusive crises requiring medication or visit to health facility
Ever occurrence of vaso‐occlusive crisis (VOC)
Yes 272 (73.1)
No 100 (26.9)
VOC episodes within preceding 12 months
0 9 (3.3)
1 36 (13.2)
2 37 (13.6)
≥3 190 (69.9)
Ever hospitalized for VOC
Yes 153 (41.1)
No 219 (58.9)
Frequency of hospitalization for VOC in the past
0 219 (58.9)
1 64 (17.2)
2 10 (2.7)
≥3 79 (21.2)
Hospitalized for VOC in preceding 12 months
Yes 153 (41.1)
No 219 (58.9)
Anemic crises
Ever occurrence of anemic crisis requiring blood transfusion
Yes 170 (45.7)
No 202 (54.3)
Episodes of anemic crisis requiring blood transfusion in the past
0 202 (54.3)
1 94 (25.3)
2 32 (8.6)
≥3 44 (11.8)
Anemic crisis requiring blood transfusion in the preceding 12 months
0 246 (66.1)
1 90 (24.2)
≥2 36 (9.7)
Experienced both VOC and anemic crisis in the past
Yes 147 (39.5)
No 225 (60.5)
Experienced both VOC and anemic crisis in the preceding 12 months
Yes 108 (29.0)
No 264 (71.0)