Table 3 Negative Binomial regression coefficients for factors affecting the initial number of CD4 cell counts
Variable | Coefficient | Standard Error | Z Score | P_value | 95% Conf. Interval |
|---|---|---|---|---|---|
Intercept | 7.08 | 0.02 | 71.69 | < 0.001 | (6.88, 7.30) |
Age | |||||
< 30 | Reference | ||||
30–40 | − 0.26 | 0.03 | − 8.44 | < 0.001 | (− 0.32, − 0.20) |
40–50 | − 0.34 | 0.04 | − 8.74 | < 0.001 | (− 0.42, − 0.27) |
> 50 | − 0.36 | 0.06 | − 6.59 | < 0.001 | (− 0.47, − 0.26) |
Sex | |||||
Female | Reference | ||||
Male | − 0.11 | 0.04 | − 2.98 | 0.003 | (− 0.18, − 0.04) |
Marital status | |||||
Single | Reference | ||||
Married | 0.01 | 0.03 | 0.28 | 0.78 | (− 0.06, 0.07) |
Divorced | 0.02 | 0.04 | 0.54 | 0.587 | (− 0.06, 0.11) |
Window | − 0.18 | 0.11 | − 1.71 | 0.086 | (− 0.39, 0.03) |
Unknown | − 0.18 | 0.11 | − 1.71 | 0.086 | (− 0.39, 0.03) |
Education | |||||
Illiterate | Reference | ||||
Primary School | 0.01 | 0.05 | 0.13 | 0.898 | (− 0.10, 0.11) |
Secondary School | 0.05 | 0.05 | 0.84 | 0.404 | (− 0.06, 0.15) |
High School | 0.04 | 0.06 | 0.71 | 0.476 | (− 0.07, 0.15) |
Academic | − 0.01 | 0.07 | − 0.12 | 0.90 | (− 0.15, 0.13) |
Unknown | − 0.06 | 0.06 | − 0.95 | 0.34 | (− 0.17, 0.06) |
Job | |||||
Employed | Reference | ||||
Unemployed | − 0.01 | 0.03 | − 0.28 | 0.78 | (− 0.07, − 0.28) |
Unknown | − 0.02 | 0.03 | − 0.57 | 0.569 | (− 0.08, 0.05) |
Transmission | |||||
Mother to child | Reference | ||||
Inject Drug User | − 0.45 | 0.09 | − 5.21 | < 0.001 | (− 0.62, − 0.28) |
Unsafe Sex | − 0.43 | 0.09 | − 4.95 | < 0.001 | (− 0.59, − 0.26) |
Blood Transfusion and Unknown | − 0.57 | 0.09 | − 6.27 | < 0.001 | (− 0.75,− 0.39) |
Year of HIV diagnosis | |||||
Before 2006 | Reference | ||||
2006–2011 | − 0.42 | 0.04 | − 9.50 | < 0.001 | (− 0.51, − 0.34) |
After 2011 | − 0.39 | 0.04 | − 8.67 | < 0.001 | (− 0.47, − 0.30) |
WHO Clinical Stage | |||||
Stage 1 | Reference | ||||
Stage 2 | − 0.24 | 0.04 | − 6.01 | < 0.001 | (− 0.31, − 0.16) |
Stage 3 | − 0.84 | 0.04 | − 20.03 | < 0.001 | (− 0.93, − 0.76) |
Stage 4 | − 0.98 | 0.05 | − 20.32 | < 0.001 | (− 1.08, − 0.89) |
Unknown | − 0.19 | 0.04 | − 5.23 | < 0.001 | (− 0.26, − 0.12) |
TB co-infection | |||||
No | Reference | ||||
Yes | − 0.12 | 0.06 | − 2.03 | 0.042 | (− 0.01, − 0.23) |
r | 0.68 | 0.01 | (0.66, 0.71) | ||