Table 1

Muscular strength (Newton) in 223 VLBW boys and expected numbers calculated from total population

Group	Definition	Observed	Expected
1	<971	0	0.04
2	972–1315	3	0.06
3	1316–1707	43	0.33
4	1708–1952	66	14.75
5	1953–2099	38	44.13
6	2100–2246	37	69.43
7	2247–2345	22	60.86
8	2346–2443	8	30.82
9	2444–	10	11.44