TABLE 2.
Joinpoint Analyses of Nasopharyngeal Carcinoma Trends by Sex and Morphology
| APC (95% CI), % | ||||||||
|---|---|---|---|---|---|---|---|---|
| All | White | Black | Other | |||||
| Male | Female | Male | Female | Male | Female | Male | Female | |
| Overall NPC | −0.2 (−0.4, 0.1) | −0.4 (−0.8, 0.0) | −1.2a (−1.5, −0.8) | −1.6a (−2.1, −1.0) | −0.1 (−1.0, 0.7) | −1.4a (−2.5, −0.4) | −1.0a (−1.4, −0.6) | −1.3a (−1.9, −0.7) |
| Keratinizing | 1.1 (−1.2, 3.5)b; −2.6a (−3.2, −2.1)c | −2.4a (−3.0, −1.7) | −2.1a (−2.6, −1.6) | −2.4a (−3.2, −1.6) | −1.2 (−2.4, 0.0) | −2.3a (−4.1, −0.4) | −3.4a (−4.1, −2.7) | −4.2a (−5.1, −3.2) |
| Nonkeratinizing | 1,0a (0.5–1.5) | 1.2a (0.5–1.8) | 0.5 (−0.2, 1.1) | −0.0 (−1.1, 1.1) | 0.6 (−0.8, 2.0) | −0.6 (−2.1,0.9) | −0.8a (−1.5, −0.2) | −0.6 (−1.5, 0.2) |
| Differentiated | 3.0a (2.1–3.9) | 4.4a (3.0–5.9) | 3.8a (2.5–5.2) | 4.0a (1.9–6.2) | 3.9a (2.0–5.7) | 2.7a (0.8–4.6) | −0.1 (−1.3, 1.0) | 1,8a (0.4–3.3) |
| Undifferentiated | −0.5 (−1.1, 0.1) | −0.8a (−1.5, −0.0) | −2.1a (−2.8, −1.3) | −1.8a (−3.0, −0.6) | −1.6 (−3.3, 0.2) | −2.7a (−4.2, −1.1) | −1.5a (−2.2, −0.6) | −2.4a (−3.5, −1.4) |
Abbreviations: APC, annual percent change; NPC, nasopharyngeal carcinoma.
a
This value indicates statistical significance at α = .05.
b
These values are for the period from 1973 through 1985.
c
These values are for the period from 1985 through 2015.