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Table 2—

Nerve function in 1982, 1990, and 1999 for tertiles of HbA1c

HbA1c tertilesHbA1c ≤ 7.8% (n = 13)HbA1c 7.9%–8.3% (n = 11)HbA1c ≥ 8.4% (n = 15)
Sensory sural NCV in 1982 51 m/s (4) 49 m/s (5) 47 m/s (7) 
Sensory sural NCV in 1990 45 m/s (5) 43 m/s (5) 39 m/s (7) 
Sensory sural NCV in 1999 44 m/s (10) 44 m/s (11) 34 m/s (15) 
Number of patients with undetectable sural NCV in 1999 
Sensory sural NAPA in 1982 7.7 μV (5) 8.3 μV (3) 7.5 μV (3) 
Sensory sural NAPA in 1990 8.3 μV (4) 6.7 μV (2) 5.9 μV (4) 
Sensory sural NAPA in 1999 9.8 μV (9) 4.8 μV (4)* 3.4 μV (4) 
Motor tibial NCV in 1982 48 m/s (5) 46 m/s (5) 47 m/s (7) 
Motor tibial NCV in 1990 42 m/s (3) 43 m/s (4) 38 m/s (5) 
Motor tibial NCV in 1999 43 m/s (6)* 43 m/s (4) 31 m/s (11) 
Number of patients with undetectable tibial NCV in 1999 
Tibial NAPA in 1999 4.9 mV (3) 4.9 mV (2) 2.6 mV 
Motor peroneal NCV in 1982 44 m/s (4) 46 m/s (4) 41 m/s (4) 
Motor peroneal NCV in 1990 42 m/s (2) 44 m/s (4) 38 m/s (5) 
Motor peroneal NCV in 1999 41 m/s (4) 42 m/s (4) 35 m/s (8)* 
Number of patients with undetectable peroneal NCV in 1999 
NAPA peroneal nerve in 1999 2.7 mV (1) 2.9 mV (1) 1.7 mV (1) 
HbA1c tertilesHbA1c ≤ 7.8% (n = 13)HbA1c 7.9%–8.3% (n = 11)HbA1c ≥ 8.4% (n = 15)
Sensory sural NCV in 1982 51 m/s (4) 49 m/s (5) 47 m/s (7) 
Sensory sural NCV in 1990 45 m/s (5) 43 m/s (5) 39 m/s (7) 
Sensory sural NCV in 1999 44 m/s (10) 44 m/s (11) 34 m/s (15) 
Number of patients with undetectable sural NCV in 1999 
Sensory sural NAPA in 1982 7.7 μV (5) 8.3 μV (3) 7.5 μV (3) 
Sensory sural NAPA in 1990 8.3 μV (4) 6.7 μV (2) 5.9 μV (4) 
Sensory sural NAPA in 1999 9.8 μV (9) 4.8 μV (4)* 3.4 μV (4) 
Motor tibial NCV in 1982 48 m/s (5) 46 m/s (5) 47 m/s (7) 
Motor tibial NCV in 1990 42 m/s (3) 43 m/s (4) 38 m/s (5) 
Motor tibial NCV in 1999 43 m/s (6)* 43 m/s (4) 31 m/s (11) 
Number of patients with undetectable tibial NCV in 1999 
Tibial NAPA in 1999 4.9 mV (3) 4.9 mV (2) 2.6 mV 
Motor peroneal NCV in 1982 44 m/s (4) 46 m/s (4) 41 m/s (4) 
Motor peroneal NCV in 1990 42 m/s (2) 44 m/s (4) 38 m/s (5) 
Motor peroneal NCV in 1999 41 m/s (4) 42 m/s (4) 35 m/s (8)* 
Number of patients with undetectable peroneal NCV in 1999 
NAPA peroneal nerve in 1999 2.7 mV (1) 2.9 mV (1) 1.7 mV (1) 

Data are means ± 1 SD.

*

P < 0.05;

P < 0.01.

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