Table 1.
Comparisons of Lap Time (seconds) for the Fast- and Usual-Paced 400 m Walk Tests Stratified by Physical Function: The Developmental Epidemiologic Cohort Study (N = 59)
| First Lap | Second Lap | Third Lap | Fourth Lap | Fifth Lap | Sixth Lap | Seventh Lap | Eighth Lap | Ninth Lap | Tenth Lap | |
|---|---|---|---|---|---|---|---|---|---|---|
| Fast-paced 400 m walk* | ||||||||||
| Overall | 31.2 (25.4–34.6) | 32.2 (27.5–37.2) | 33.3 (27.6–37.0) | 34.2 (28.3–37.6) | 35.0 (29.0–41.0) | 33.9 (28.3–39.1) | 33.8 (27.8–39.1) | 33.6 (27.8–37.6) | 33.7 (27.5–37.4) | 33.5 (27.0–37.1) |
| Lower function (n = 23) | 34.8 (31.3–36.6) | 37.2 (32.8–39.4) | 37.0 (33.5–40.9) | 37.6 (34.4–41.3) | 41.0 (35.8–43.7) | 39.1 (35.3–42.5) | 39.1 (34.9–41.4) | 36.9 (34.3–41.5) | 37.0 (34.4–41.6) | 36.8 (34.6–40.9) |
| Higher function (n = 36) | 28.0 (24.9–32.1) | 29.3 (26.5–33.0) | 29.7 (26.1–33.4) | 30.1 (27.0–34.4) | 30.9 (28.2–34.9) | 30.2 (26.9–34.4) | 28.9 (27.0–33.8) | 29.0 (26.5–33.7) | 29.1 (26.6–33.9) | 28.8 (26.3–34.0) |
| Usual-paced 400 m walk | ||||||||||
| Overall | 35.6 (32.8–39.0) | 38.0 (34.4–41.1) | 38.6 (34.3–42.0) | 39.3 (34.7–42.2) | 39.5 (35.7–42.7) | 39.0 (35.2–42.1) | 38.4 (34.9–42.3) | 38.1 (34.8–41.8) | 38.0 (34.7–41.8) | 38.1 (34.0–41.7) |
| Lower function (n = 23) | 38.3 (34.8–40.3) | 40.3 (37.9–43.4) | 41.8 (37.9–44.8) | 41.7 (38.8–44.5) | 42.7 (39.8–45.8) | 41.3 (39.2–43.9) | 41.6 (38.6–44.0) | 40.9 (39.2–43.5) | 41.3 (38.3–43.9) | 41.6 (37.8–43.4) |
| Higher function (n = 36) | 33.9 (30.0–37.0) | 35.9 (32.0–38.8) | 36.4 (32.6–40.0) | 36.8 (32.3–39.4) | 37.4 (33.1–40.6) | 36.0 (32.8–39.6) | 36.2 (33.0–39.8) | 36.0 (33.0–39.6) | 35.7 (32.8–40.0) | 35.9 (32.8–39.9) |
Notes: All values are given as median (IQR). Lower function categorized as Short Physical Performance Battery (SPPB) score <10; higher function as SPPB ≥10.
*There were 2 participants who did not complete the 10th lap.